231102112221 has 24 divisors (see below), whose sum is σ = 342862359840. Its totient is φ = 149892620256.

The previous prime is 231102112201. The next prime is 231102112223. The reversal of 231102112221 is 122211201132.

231102112221 is a `hidden beast` number, since 231 + 1 + 0 + 211 + 2 + 221 = 666.

It is not a de Polignac number, because 231102112221 - 2²⁵ = 231068557789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231102112194 and 231102112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231102112223) 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, 7823746 + ... + 7853228.

It is an arithmetic number, because the mean of its divisors is an integer number (14285931660).

Almost surely, 2^231102112221 is an apocalyptic number.

It is an amenable number.

231102112221 is a deficient number, since it is larger than the sum of its proper divisors (111760247619).

231102112221 is a wasteful number, since it uses less digits than its factorization.

231102112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53065 (or 53062 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 231102112221 its reverse (122211201132), we get a palindrome (353313313353).

The spelling of 231102112221 in words is "two hundred thirty-one billion, one hundred two million, one hundred twelve thousand, two hundred twenty-one".