31213111301012 has 24 divisors (see below), whose sum is σ = 55042283692704. Its totient is φ = 15487192425312.

The previous prime is 31213111301011. The next prime is 31213111301041. The reversal of 31213111301012 is 21010311131213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213111301011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55707683 + ... + 56265194.

It is an arithmetic number, because the mean of its divisors is an integer number (2293428487196).

Almost surely, 2^{31213111301012} is an apocalyptic number.

It is an amenable number.

31213111301012 is a deficient number, since it is larger than the sum of its proper divisors (23829172391692).

31213111301012 is a wasteful number, since it uses less digits than its factorization.

31213111301012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111973415 (or 111973413 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31213111301012 its reverse (21010311131213), we get a palindrome (52223422432225).

The spelling of 31213111301012 in words is "thirty-one trillion, two hundred thirteen billion, one hundred eleven million, three hundred one thousand, twelve".