113121222012 has 36 divisors (see below), whose sum is σ = 286165896016. Its totient is φ = 37677985920.

The previous prime is 113121221989. The next prime is 113121222059. The reversal of 113121222012 is 210222121311.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1164664 + ... + 1258047.

Almost surely, 2^113121222012 is an apocalyptic number.

113121222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

113121222012 is an abundant number, since it is smaller than the sum of its proper divisors (173044674004).

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

113121222012 is a wasteful number, since it uses less digits than its factorization.

113121222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424018 (or 2424013 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 113121222012 its reverse (210222121311), we get a palindrome (323343343323).

The spelling of 113121222012 in words is "one hundred thirteen billion, one hundred twenty-one million, two hundred twenty-two thousand, twelve".