13122021525 has 24 divisors (see below), whose sum is σ = 22638342720. Its totient is φ = 6694131840.

The previous prime is 13122021511. The next prime is 13122021533. The reversal of 13122021525 is 52512022131.

It is not a de Polignac number, because 13122021525 - 2⁷ = 13122021397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13122021495 and 13122021504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3801760 + ... + 3805209.

It is an arithmetic number, because the mean of its divisors is an integer number (943264280).

Almost surely, 2^13122021525 is an apocalyptic number.

13122021525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13122021525 is a deficient number, since it is larger than the sum of its proper divisors (9516321195).

13122021525 is a wasteful number, since it uses less digits than its factorization.

13122021525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7607005 (or 7607000 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 13122021525 its reverse (52512022131), we get a palindrome (65634043656).

The spelling of 13122021525 in words is "thirteen billion, one hundred twenty-two million, twenty-one thousand, five hundred twenty-five".