231312121132 has 96 divisors (see below), whose sum is σ = 427623235200. Its totient is φ = 109371525120.

The previous prime is 231312121123. The next prime is 231312121217. The reversal of 231312121132 is 231121213132.

It is a super-2 number, since 2×231312121132² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299239098 + ... + 299239870.

It is an arithmetic number, because the mean of its divisors is an integer number (4454408700).

Almost surely, 2^231312121132 is an apocalyptic number.

It is an amenable number.

231312121132 is a deficient number, since it is larger than the sum of its proper divisors (196311114068).

231312121132 is a wasteful number, since it uses less digits than its factorization.

231312121132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1241 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 231312121132 its reverse (231121213132), we get a palindrome (462433334264).

The spelling of 231312121132 in words is "two hundred thirty-one billion, three hundred twelve million, one hundred twenty-one thousand, one hundred thirty-two".