13212420312 has 64 divisors (see below), whose sum is σ = 40653607680. Its totient is φ = 3484593792.

The previous prime is 13212420269. The next prime is 13212420341. The reversal of 13212420312 is 21302421231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3022638 + ... + 3027005.

It is an arithmetic number, because the mean of its divisors is an integer number (635212620).

Almost surely, 2^13212420312 is an apocalyptic number.

13212420312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13212420312 is an abundant number, since it is smaller than the sum of its proper divisors (27441187368).

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

13212420312 is a wasteful number, since it uses less digits than its factorization.

13212420312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6049672 (or 6049668 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 13212420312 its reverse (21302421231), we get a palindrome (34514841543).

The spelling of 13212420312 in words is "thirteen billion, two hundred twelve million, four hundred twenty thousand, three hundred twelve".