13213656212 has 12 divisors (see below), whose sum is σ = 23158059540. Its totient is φ = 6597067776.

The previous prime is 13213656139. The next prime is 13213656217. The reversal of 13213656212 is 21265631231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13152878596 + 60777616 = 114686^2 + 7796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213656217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2437037 + ... + 2442452.

It is an arithmetic number, because the mean of its divisors is an integer number (1929838295).

Almost surely, 2^13213656212 is an apocalyptic number.

It is an amenable number.

13213656212 is a deficient number, since it is larger than the sum of its proper divisors (9944403328).

13213656212 is a wasteful number, since it uses less digits than its factorization.

13213656212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4880170 (or 4880168 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The spelling of 13213656212 in words is "thirteen billion, two hundred thirteen million, six hundred fifty-six thousand, two hundred twelve".