31213000031214 has 64 divisors (see below), whose sum is σ = 63084497256000. Its totient is φ = 10295131235328.

The previous prime is 31213000031177. The next prime is 31213000031351. The reversal of 31213000031214 is 41213000031213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1691110674 + ... + 1691129130.

It is an arithmetic number, because the mean of its divisors is an integer number (985695269625).

Almost surely, 2^{31213000031214} is an apocalyptic number.

31213000031214 is an abundant number, since it is smaller than the sum of its proper divisors (31871497224786).

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

31213000031214 is a wasteful number, since it uses less digits than its factorization.

31213000031214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25717.

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

Adding to 31213000031214 its reverse (41213000031213), we get a palindrome (72426000062427).

Subtracting 31213000031214 from its reverse (41213000031213), we obtain a palindrome (9999999999999).

The spelling of 31213000031214 in words is "thirty-one trillion, two hundred thirteen billion, thirty-one thousand, two hundred fourteen".