13212121300 has 36 divisors (see below), whose sum is σ = 32766062560. Its totient is φ = 4529869920.

The previous prime is 13212121297. The next prime is 13212121309. The reversal of 13212121300 is 312121231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212121309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9436530 + ... + 9437929.

Almost surely, 2^13212121300 is an apocalyptic number.

13212121300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13212121300 is an abundant number, since it is smaller than the sum of its proper divisors (19553941260).

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

13212121300 is a wasteful number, since it uses less digits than its factorization.

13212121300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18874480 (or 18874473 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13212121300 its reverse (312121231), we get a palindrome (13524242531).

The spelling of 13212121300 in words is "thirteen billion, two hundred twelve million, one hundred twenty-one thousand, three hundred".