13125421008 has 160 divisors (see below), whose sum is σ = 45323289600. Its totient is φ = 3552729984.

The previous prime is 13125420991. The next prime is 13125421031. The reversal of 13125421008 is 80012452131.

13125421008 is a `hidden beast` number, since 1 + 3 + 12 + 542 + 100 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56766 + ... + 171677.

It is an arithmetic number, because the mean of its divisors is an integer number (283270560).

Almost surely, 2^13125421008 is an apocalyptic number.

13125421008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13125421008 is an abundant number, since it is smaller than the sum of its proper divisors (32197868592).

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

13125421008 is a wasteful number, since it uses less digits than its factorization.

13125421008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228486 (or 228474 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 13125421008 its reverse (80012452131), we get a palindrome (93137873139).

The spelling of 13125421008 in words is "thirteen billion, one hundred twenty-five million, four hundred twenty-one thousand, eight".