231212112112220 has 24 divisors (see below), whose sum is σ = 485545772132064. Its totient is φ = 92484780712256.

The previous prime is 231212112112183. The next prime is 231212112112253. The reversal of 231212112112220 is 22211211212132.

231212112112220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34646654 + ... + 40777626.

It is an arithmetic number, because the mean of its divisors is an integer number (20231073838836).

Almost surely, 2^{231212112112220} is an apocalyptic number.

231212112112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231212112112220 is an abundant number, since it is smaller than the sum of its proper divisors (254333660019844).

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

231212112112220 is a wasteful number, since it uses less digits than its factorization.

231212112112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8016589 (or 8016587 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 231212112112220 its reverse (22211211212132), we get a palindrome (253423323324352).

The spelling of 231212112112220 in words is "two hundred thirty-one trillion, two hundred twelve billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty".