13121371800 has 288 divisors, whose sum is σ = 46888405200. Its totient is φ = 3276963840.

The previous prime is 13121371799. The next prime is 13121371841. The reversal of 13121371800 is 817312131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6945256 + ... + 6947144.

Almost surely, 2^13121371800 is an apocalyptic number.

13121371800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13121371800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23444202600).

13121371800 is an abundant number, since it is smaller than the sum of its proper divisors (33767033400).

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

13121371800 is a wasteful number, since it uses less digits than its factorization.

13121371800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155 (or 2143 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

Adding to 13121371800 its reverse (817312131), we get a palindrome (13938683931).

The spelling of 13121371800 in words is "thirteen billion, one hundred twenty-one million, three hundred seventy-one thousand, eight hundred".