1121100201220 has 96 divisors (see below), whose sum is σ = 2604216738816. Its totient is φ = 403525017600.

The previous prime is 1121100201217. The next prime is 1121100201233. The reversal of 1121100201220 is 221020011211.

It is a super-2 number, since 2×1121100201220² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121100201220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 234060 + ... + 1515580.

It is an arithmetic number, because the mean of its divisors is an integer number (27127257696).

Almost surely, 2^{1121100201220} is an apocalyptic number.

1121100201220 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 1121100201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302108369408).

1121100201220 is an abundant number, since it is smaller than the sum of its proper divisors (1483116537596).

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

1121100201220 is a wasteful number, since it uses less digits than its factorization.

1121100201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281661 (or 1281659 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1121100201220 its reverse (221020011211), we get a palindrome (1342120212431).

The spelling of 1121100201220 in words is "one trillion, one hundred twenty-one billion, one hundred million, two hundred one thousand, two hundred twenty".