13121323100 has 36 divisors (see below), whose sum is σ = 28574660688. Its totient is φ = 5229840000.

The previous prime is 13121323091. The next prime is 13121323123. The reversal of 13121323100 is 132312131.

It is a super-2 number, since 2×13121323100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205376 + ... + 261575.

Almost surely, 2^13121323100 is an apocalyptic number.

13121323100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121323100 is an abundant number, since it is smaller than the sum of its proper divisors (15453337588).

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

13121323100 is a wasteful number, since it uses less digits than its factorization.

13121323100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467246 (or 467239 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13121323100 its reverse (132312131), we get a palindrome (13253635231).

The spelling of 13121323100 in words is "thirteen billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred".