13121003100 has 36 divisors (see below), whose sum is σ = 37963436504. Its totient is φ = 3498934080.

The previous prime is 13121003069. The next prime is 13121003149. The reversal of 13121003100 is 130012131.

It is a super-2 number, since 2×13121003100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 21868039 + ... + 21868638.

Almost surely, 2^13121003100 is an apocalyptic number.

13121003100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121003100 is an abundant number, since it is smaller than the sum of its proper divisors (24842433404).

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

13121003100 is a wasteful number, since it uses less digits than its factorization.

13121003100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43736694 (or 43736687 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 13121003100 its reverse (130012131), we get a palindrome (13251015231).

The spelling of 13121003100 in words is "thirteen billion, one hundred twenty-one million, three thousand, one hundred".