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12011211201220 = 22571143925916857
BaseRepresentation
bin1010111011001001001111…
…1110100001101011000100
31120112021000221221010122021
42232302103332201223010
53033242430031414340
641313512501012524
72346532003444240
oct256622376415304
946467027833567
1012011211201220
113910a20656260
12141ba2a3b4144
136918632c3a6a
142d74ba949420
1515c68c2cce4a
hexaec93fa1ac4

12011211201220 has 192 divisors, whose sum is σ = 31535932538880. Its totient is φ = 3733240089600.

The previous prime is 12011211201211. The next prime is 12011211201221. The reversal of 12011211201220 is 2210211211021.

It is a junction number, because it is equal to n+sod(n) for n = 12011211201194 and 12011211201203.

It is not an unprimeable number, because it can be changed into a prime (12011211201221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1751668032 + ... + 1751674888.

It is an arithmetic number, because the mean of its divisors is an integer number (164249648640).

Almost surely, 212011211201220 is an apocalyptic number.

12011211201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011211201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15767966269440).

12011211201220 is an abundant number, since it is smaller than the sum of its proper divisors (19524721337660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12011211201220 is a wasteful number, since it uses less digits than its factorization.

12011211201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9914 (or 9912 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12011211201220 its reverse (2210211211021), we get a palindrome (14221422412241).

The spelling of 12011211201220 in words is "twelve trillion, eleven billion, two hundred eleven million, two hundred one thousand, two hundred twenty".