231321012210 has 48 divisors (see below), whose sum is σ = 607273827264. Its totient is φ = 61086711456.

The previous prime is 231321012203. The next prime is 231321012227. The reversal of 231321012210 is 12210123132.

231321012210 is a `hidden beast` number, since 231 + 3 + 210 + 1 + 221 + 0 = 666.

231321012210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×231321012210³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12467592 + ... + 12486131.

It is an arithmetic number, because the mean of its divisors is an integer number (12651538068).

Almost surely, 2^231321012210 is an apocalyptic number.

231321012210 is an abundant number, since it is smaller than the sum of its proper divisors (375952815054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231321012210 is a wasteful number, since it uses less digits than its factorization.

231321012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24953839 (or 24953836 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231321012210 its reverse (12210123132), we get a palindrome (243531135342).

The spelling of 231321012210 in words is "two hundred thirty-one billion, three hundred twenty-one million, twelve thousand, two hundred ten".