31000021010212 has 12 divisors (see below), whose sum is σ = 56608734018816. Its totient is φ = 14826097004840.

The previous prime is 31000021010137. The next prime is 31000021010239. The reversal of 31000021010212 is 21201012000013.

It is a super-2 number, since 2×31000021010212² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31000021010192 and 31000021010201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168478374964 + ... + 168478375147.

It is an arithmetic number, because the mean of its divisors is an integer number (4717394501568).

Almost surely, 2^{31000021010212} is an apocalyptic number.

It is an amenable number.

31000021010212 is a deficient number, since it is larger than the sum of its proper divisors (25608713008604).

31000021010212 is a wasteful number, since it uses less digits than its factorization.

31000021010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336956750138 (or 336956750136 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31000021010212 its reverse (21201012000013), we get a palindrome (52201033010225).

The spelling of 31000021010212 in words is "thirty-one trillion, twenty-one million, ten thousand, two hundred twelve".