113231220321 has 12 divisors (see below), whose sum is σ = 154747096016. Its totient is φ = 73646318880.

The previous prime is 113231220317. The next prime is 113231220329. The reversal of 113231220321 is 123022132311.

It is not a de Polignac number, because 113231220321 - 2² = 113231220317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (113231220329) 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, 11221531 + ... + 11231616.

Almost surely, 2^113231220321 is an apocalyptic number.

It is an amenable number.

113231220321 is a deficient number, since it is larger than the sum of its proper divisors (41515875695).

113231220321 is an equidigital number, since it uses as much as digits as its factorization.

113231220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22453232 (or 22453191 counting only the distinct ones).

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

Adding to 113231220321 its reverse (123022132311), we get a palindrome (236253352632).

The spelling of 113231220321 in words is "one hundred thirteen billion, two hundred thirty-one million, two hundred twenty thousand, three hundred twenty-one".