31000202212 has 72 divisors (see below), whose sum is σ = 63911985984. Its totient is φ = 13117301568.

The previous prime is 31000202209. The next prime is 31000202227. The reversal of 31000202212 is 21220200013.

It is a super-2 number, since 2×31000202212² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31000202192 and 31000202201.

It is an unprimeable number.

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, 6645793 + ... + 6650455.

It is an arithmetic number, because the mean of its divisors is an integer number (887666472).

Almost surely, 2^31000202212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31000202212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31955992992).

31000202212 is an abundant number, since it is smaller than the sum of its proper divisors (32911783772).

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

31000202212 is a wasteful number, since it uses less digits than its factorization.

31000202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105 (or 5096 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 31000202212 its reverse (21220200013), we get a palindrome (52220402225).

The spelling of 31000202212 in words is "thirty-one billion, two hundred two thousand, two hundred twelve".