113121322100 has 36 divisors (see below), whose sum is σ = 245488561164. Its totient is φ = 45245710080.

The previous prime is 113121322087. The next prime is 113121322201. The reversal of 113121322100 is 1223121311.

It can be written as a sum of positive squares in 6 ways, for example, as 32332355344 + 80788966756 = 179812^2 + 284234^2 .

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, 2450432 + ... + 2496168.

It is an arithmetic number, because the mean of its divisors is an integer number (6819126699).

Almost surely, 2^113121322100 is an apocalyptic number.

113121322100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113121322100 is an abundant number, since it is smaller than the sum of its proper divisors (132367239064).

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

113121322100 is a wasteful number, since it uses less digits than its factorization.

113121322100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70484 (or 70477 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 113121322100 its reverse (1223121311), we get a palindrome (114344443411).

The spelling of 113121322100 in words is "one hundred thirteen billion, one hundred twenty-one million, three hundred twenty-two thousand, one hundred".