13212221312 has 32 divisors (see below), whose sum is σ = 26752733400. Its totient is φ = 6497809920.

The previous prime is 13212221293. The next prime is 13212221339. The reversal of 13212221312 is 21312221231.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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, 838262 + ... + 853877.

Almost surely, 2^13212221312 is an apocalyptic number.

It is an amenable number.

13212221312 is an abundant number, since it is smaller than the sum of its proper divisors (13540512088).

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

13212221312 is an equidigital number, since it uses as much as digits as its factorization.

13212221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692214 (or 1692202 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 13212221312 its reverse (21312221231), we get a palindrome (34524442543).

The spelling of 13212221312 in words is "thirteen billion, two hundred twelve million, two hundred twenty-one thousand, three hundred twelve".