231121302312 has 16 divisors (see below), whose sum is σ = 577803255840. Its totient is φ = 77040434096.

The previous prime is 231121302289. The next prime is 231121302319. The reversal of 231121302312 is 213203121132.

It is not an unprimeable number, because it can be changed into a prime (231121302319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4815027108 + ... + 4815027155.

It is an arithmetic number, because the mean of its divisors is an integer number (36112703490).

Almost surely, 2^231121302312 is an apocalyptic number.

It is an amenable number.

231121302312 is an abundant number, since it is smaller than the sum of its proper divisors (346681953528).

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

231121302312 is a wasteful number, since it uses less digits than its factorization.

231121302312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9630054272 (or 9630054268 counting only the distinct ones).

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

Adding to 231121302312 its reverse (213203121132), we get a palindrome (444324423444).

The spelling of 231121302312 in words is "two hundred thirty-one billion, one hundred twenty-one million, three hundred two thousand, three hundred twelve".