13121399610 has 96 divisors (see below), whose sum is σ = 37293048000. Its totient is φ = 3174451200.

The previous prime is 13121399609. The next prime is 13121399623. The reversal of 13121399610 is 1699312131.

13121399610 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 1 + 39 + 9 + 610 = 666.

It is a super-2 number, since 2×13121399610² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 480730 + ... + 507290.

It is an arithmetic number, because the mean of its divisors is an integer number (388469250).

Almost surely, 2^13121399610 is an apocalyptic number.

13121399610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13121399610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18646524000).

13121399610 is an abundant number, since it is smaller than the sum of its proper divisors (24171648390).

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

13121399610 is a wasteful number, since it uses less digits than its factorization.

13121399610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27084 (or 27081 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The spelling of 13121399610 in words is "thirteen billion, one hundred twenty-one million, three hundred ninety-nine thousand, six hundred ten".