13121251025 has 24 divisors (see below), whose sum is σ = 17048385024. Its totient is φ = 9998841600.

The previous prime is 13121250893. The next prime is 13121251069. The reversal of 13121251025 is 52015212131.

It is not a de Polignac number, because 13121251025 - 2¹⁰ = 13121250001 is a prime.

It is a super-2 number, since 2×13121251025² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91232 + ... + 185918.

It is an arithmetic number, because the mean of its divisors is an integer number (710349376).

Almost surely, 2^13121251025 is an apocalyptic number.

It is an amenable number.

13121251025 is a deficient number, since it is larger than the sum of its proper divisors (3927133999).

13121251025 is a wasteful number, since it uses less digits than its factorization.

13121251025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94961 (or 94956 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 13121251025 its reverse (52015212131), we get a palindrome (65136463156).

The spelling of 13121251025 in words is "thirteen billion, one hundred twenty-one million, two hundred fifty-one thousand, twenty-five".