231302311212 has 48 divisors (see below), whose sum is σ = 617176546560. Its totient is φ = 66046690752.

The previous prime is 231302311181. The next prime is 231302311223. The reversal of 231302311212 is 212113203132.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685887 + ... + 965942.

It is an arithmetic number, because the mean of its divisors is an integer number (12857844720).

Almost surely, 2^231302311212 is an apocalyptic number.

It is an amenable number.

231302311212 is an abundant number, since it is smaller than the sum of its proper divisors (385874235348).

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

231302311212 is a wasteful number, since it uses less digits than its factorization.

231302311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653510 (or 1653508 counting only the distinct ones).

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

Adding to 231302311212 its reverse (212113203132), we get a palindrome (443415514344).

The spelling of 231302311212 in words is "two hundred thirty-one billion, three hundred two million, three hundred eleven thousand, two hundred twelve".