13121789700 has 72 divisors (see below), whose sum is σ = 38848673248. Its totient is φ = 3417765120.

The previous prime is 13121789689. The next prime is 13121789701. The reversal of 13121789700 is 798712131.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13121789701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 495697 + ... + 521496.

Almost surely, 2^13121789700 is an apocalyptic number.

13121789700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121789700 is an abundant number, since it is smaller than the sum of its proper divisors (25726883548).

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

13121789700 is a wasteful number, since it uses less digits than its factorization.

13121789700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017253 (or 1017246 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 39.

The spelling of 13121789700 in words is "thirteen billion, one hundred twenty-one million, seven hundred eighty-nine thousand, seven hundred".