31220131312012 has 6 divisors (see below), whose sum is σ = 54635229796028. Its totient is φ = 15610065656004.

The previous prime is 31220131312003. The next prime is 31220131312021. The reversal of 31220131312012 is 21021313102213.

It is an interprime number because it is at equal distance from previous prime (31220131312003) and next prime (31220131312021).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3902516413998 + ... + 3902516414005.

Almost surely, 2^{31220131312012} is an apocalyptic number.

It is an amenable number.

31220131312012 is a deficient number, since it is larger than the sum of its proper divisors (23415098484016).

31220131312012 is a wasteful number, since it uses less digits than its factorization.

31220131312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7805032828007 (or 7805032828005 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31220131312012 its reverse (21021313102213), we get a palindrome (52241444414225).

The spelling of 31220131312012 in words is "thirty-one trillion, two hundred twenty billion, one hundred thirty-one million, three hundred twelve thousand, twelve".