1201012111220 has 24 divisors (see below), whose sum is σ = 2522146124904. Its totient is φ = 480400903296.

The previous prime is 1201012111183. The next prime is 1201012111223. The reversal of 1201012111220 is 221112101021.

It can be written as a sum of positive squares in 4 ways, for example, as 26190243556 + 1174821867664 = 161834^2 + 1083892^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1201012111195 and 1201012111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201012111223) 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 7 ways as a sum of consecutive naturals, for example, 4290674 + ... + 4562006.

It is an arithmetic number, because the mean of its divisors is an integer number (105089421871).

Almost surely, 2^{1201012111220} is an apocalyptic number.

1201012111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201012111220 is an abundant number, since it is smaller than the sum of its proper divisors (1321134013684).

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

1201012111220 is a wasteful number, since it uses less digits than its factorization.

1201012111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492659 (or 492657 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201012111220 its reverse (221112101021), we get a palindrome (1422124212241).

The spelling of 1201012111220 in words is "one trillion, two hundred one billion, twelve million, one hundred eleven thousand, two hundred twenty".