31220212112001 has 24 divisors (see below), whose sum is σ = 49450384672416. Its totient is φ = 18823302627840.

The previous prime is 31220212111997. The next prime is 31220212112039. The reversal of 31220212112001 is 10021121202213.

31220212112001 is a `hidden beast` number, since 31 + 220 + 2 + 1 + 211 + 200 + 1 = 666.

It is not a de Polignac number, because 31220212112001 - 2² = 31220212111997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31220212112041) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 816964515 + ... + 817002728.

It is an arithmetic number, because the mean of its divisors is an integer number (2060432694684).

Almost surely, 2^{31220212112001} is an apocalyptic number.

It is an amenable number.

31220212112001 is a deficient number, since it is larger than the sum of its proper divisors (18230172560415).

31220212112001 is a wasteful number, since it uses less digits than its factorization.

31220212112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633967453 (or 1633967450 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 31220212112001 its reverse (10021121202213), we get a palindrome (41241333314214).

The spelling of 31220212112001 in words is "thirty-one trillion, two hundred twenty billion, two hundred twelve million, one hundred twelve thousand, one".