31212030213 has 64 divisors (see below), whose sum is σ = 56973127680. Its totient is φ = 16445467584.

The previous prime is 31212030169. The next prime is 31212030251. The reversal of 31212030213 is 31203021213.

It is not a de Polignac number, because 31212030213 - 2⁶ = 31212030149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212038213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2408770 + ... + 2421692.

It is an arithmetic number, because the mean of its divisors is an integer number (890205120).

Almost surely, 2^31212030213 is an apocalyptic number.

It is an amenable number.

31212030213 is a deficient number, since it is larger than the sum of its proper divisors (25761097467).

31212030213 is a wasteful number, since it uses less digits than its factorization.

31212030213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13935 (or 13929 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31212030213 its reverse (31203021213), we get a palindrome (62415051426).

The spelling of 31212030213 in words is "thirty-one billion, two hundred twelve million, thirty thousand, two hundred thirteen".