113123321 has 12 divisors (see below), whose sum is σ = 126420372. Its totient is φ = 100859904.

The previous prime is 113123317. The next prime is 113123327. The reversal of 113123321 is 123321311.

It can be written as a sum of positive squares in 2 ways, for example, as 76387600 + 36735721 = 8740^2 + 6061^2 .

It is not a de Polignac number, because 113123321 - 2² = 113123317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113123321.

It is not an unprimeable number, because it can be changed into a prime (113123327) 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 11 ways as a sum of consecutive naturals, for example, 3080 + ... + 15353.

It is an arithmetic number, because the mean of its divisors is an integer number (10535031).

Almost surely, 2^113123321 is an apocalyptic number.

It is an amenable number.

113123321 is a deficient number, since it is larger than the sum of its proper divisors (13297051).

113123321 is a wasteful number, since it uses less digits than its factorization.

113123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18488 (or 18469 counting only the distinct ones).

The product of its digits is 108, while the sum is 17.

The square root of 113123321 is about 10635.9447629254. The cubic root of 113123321 is about 483.6346208193.

Adding to 113123321 its reverse (123321311), we get a palindrome (236444632).

The spelling of 113123321 in words is "one hundred thirteen million, one hundred twenty-three thousand, three hundred twenty-one".