231312100212 has 72 divisors (see below), whose sum is σ = 603751529472. Its totient is φ = 74594001600.

The previous prime is 231312100183. The next prime is 231312100259. The reversal of 231312100212 is 212001213132.

231312100212 is a `hidden beast` number, since 231 + 312 + 100 + 21 + 2 = 666.

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

It is a congruent number.

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, 3832533 + ... + 3892419.

Almost surely, 2^231312100212 is an apocalyptic number.

It is an amenable number.

231312100212 is an abundant number, since it is smaller than the sum of its proper divisors (372439429260).

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

231312100212 is a wasteful number, since it uses less digits than its factorization.

231312100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63389 (or 63384 counting only the distinct ones).

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

Adding to 231312100212 its reverse (212001213132), we get a palindrome (443313313344).

The spelling of 231312100212 in words is "two hundred thirty-one billion, three hundred twelve million, one hundred thousand, two hundred twelve".