231311220101312 has 28 divisors (see below), whose sum is σ = 494316525650976. Its totient is φ = 106759024661760.

The previous prime is 231311220101257. The next prime is 231311220101359. The reversal of 231311220101312 is 213101022113132.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139009145864 + ... + 139009147527.

It is an arithmetic number, because the mean of its divisors is an integer number (17654161630392).

Almost surely, 2^{231311220101312} is an apocalyptic number.

It is an amenable number.

231311220101312 is an abundant number, since it is smaller than the sum of its proper divisors (263005305549664).

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

231311220101312 is a wasteful number, since it uses less digits than its factorization.

231311220101312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278018293416 (or 278018293406 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 231311220101312 its reverse (213101022113132), we get a palindrome (444412242214444).

The spelling of 231311220101312 in words is "two hundred thirty-one trillion, three hundred eleven billion, two hundred twenty million, one hundred one thousand, three hundred twelve".