113121311553 has 24 divisors (see below), whose sum is σ = 164187404160. Its totient is φ = 75050025120.

The previous prime is 113121311543. The next prime is 113121311573. The reversal of 113121311553 is 355113121311.

It is not a de Polignac number, because 113121311553 - 2⁸ = 113121311297 is a prime.

It is a super-2 number, since 2×113121311553² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (113121311543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3470550 + ... + 3502992.

It is an arithmetic number, because the mean of its divisors is an integer number (6841141840).

Almost surely, 2^113121311553 is an apocalyptic number.

It is an amenable number.

113121311553 is a deficient number, since it is larger than the sum of its proper divisors (51066092607).

113121311553 is a wasteful number, since it uses less digits than its factorization.

113121311553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34309 (or 34306 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

Adding to 113121311553 its reverse (355113121311), we get a palindrome (468234432864).

The spelling of 113121311553 in words is "one hundred thirteen billion, one hundred twenty-one million, three hundred eleven thousand, five hundred fifty-three".