13121365125 has 32 divisors (see below), whose sum is σ = 23818863744. Its totient is φ = 6361872000.

The previous prime is 13121365111. The next prime is 13121365181. The reversal of 13121365125 is 52156312131.

It is not a de Polignac number, because 13121365125 - 2¹⁴ = 13121348741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13121365092 and 13121365101.

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, 1586344 + ... + 1594593.

It is an arithmetic number, because the mean of its divisors is an integer number (744339492).

Almost surely, 2^13121365125 is an apocalyptic number.

13121365125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13121365125 is a deficient number, since it is larger than the sum of its proper divisors (10697498619).

13121365125 is a wasteful number, since it uses less digits than its factorization.

13121365125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180966 (or 3180956 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

Adding to 13121365125 its reverse (52156312131), we get a palindrome (65277677256).

The spelling of 13121365125 in words is "thirteen billion, one hundred twenty-one million, three hundred sixty-five thousand, one hundred twenty-five".