31213023001000 has 32 divisors (see below), whose sum is σ = 73038473824680. Its totient is φ = 12485209200000.

The previous prime is 31213023000953. The next prime is 31213023001019. The reversal of 31213023001000 is 10032031213.

It can be written as a sum of positive squares in 4 ways, for example, as 9099911759236 + 22113111241764 = 3016606^2 + 4702458^2 .

It is an unprimeable number.

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, 15606510501 + ... + 15606512500.

Almost surely, 2^{31213023001000} is an apocalyptic number.

It is an amenable number.

31213023001000 is an abundant number, since it is smaller than the sum of its proper divisors (41825450823680).

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

31213023001000 is a wasteful number, since it uses less digits than its factorization.

31213023001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31213023022 (or 31213023008 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31213023001000 its reverse (10032031213), we get a palindrome (31223055032213).

The spelling of 31213023001000 in words is "thirty-one trillion, two hundred thirteen billion, twenty-three million, one thousand".