31200310212 has 12 divisors (see below), whose sum is σ = 72800723856. Its totient is φ = 10400103400.

The previous prime is 31200310151. The next prime is 31200310261. The reversal of 31200310212 is 21201300213.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 31200310191 and 31200310200.

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, 1300012914 + ... + 1300012937.

It is an arithmetic number, because the mean of its divisors is an integer number (6066726988).

Almost surely, 2^31200310212 is an apocalyptic number.

It is an amenable number.

31200310212 is an abundant number, since it is smaller than the sum of its proper divisors (41600413644).

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

31200310212 is a wasteful number, since it uses less digits than its factorization.

31200310212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600025858 (or 2600025856 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31200310212 its reverse (21201300213), we get a palindrome (52401610425).

Subtracting from 31200310212 its reverse (21201300213), we obtain a palindrome (9999009999).

The spelling of 31200310212 in words is "thirty-one billion, two hundred million, three hundred ten thousand, two hundred twelve".