113403021123 has 32 divisors (see below), whose sum is σ = 177223090176. Its totient is φ = 63151609248.

The previous prime is 113403021119. The next prime is 113403021143. The reversal of 113403021123 is 321120304311.

It is not a de Polignac number, because 113403021123 - 2² = 113403021119 is a prime.

It is a super-2 number, since 2×113403021123² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 113403021123.

It is not an unprimeable number, because it can be changed into a prime (113403021143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258286 + ... + 541772.

It is an arithmetic number, because the mean of its divisors is an integer number (5538221568).

Almost surely, 2^113403021123 is an apocalyptic number.

113403021123 is a deficient number, since it is larger than the sum of its proper divisors (63820069053).

113403021123 is a wasteful number, since it uses less digits than its factorization.

113403021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283983.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 113403021123 its reverse (321120304311), we get a palindrome (434523325434).

The spelling of 113403021123 in words is "one hundred thirteen billion, four hundred three million, twenty-one thousand, one hundred twenty-three".