113231023221 has 4 divisors (see below), whose sum is σ = 150974697632. Its totient is φ = 75487348812.

The previous prime is 113231023219. The next prime is 113231023231. The reversal of 113231023221 is 122320132311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 113231023221 - 2¹ = 113231023219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113231023231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18871837201 + ... + 18871837206.

It is an arithmetic number, because the mean of its divisors is an integer number (37743674408).

Almost surely, 2^113231023221 is an apocalyptic number.

It is an amenable number.

113231023221 is a deficient number, since it is larger than the sum of its proper divisors (37743674411).

113231023221 is an equidigital number, since it uses as much as digits as its factorization.

113231023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37743674410.

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

Adding to 113231023221 its reverse (122320132311), we get a palindrome (235551155532).

The spelling of 113231023221 in words is "one hundred thirteen billion, two hundred thirty-one million, twenty-three thousand, two hundred twenty-one".