13112256521 has 8 divisors (see below), whose sum is σ = 16138161984. Its totient is φ = 10374532560.

The previous prime is 13112256511. The next prime is 13112256541. The reversal of 13112256521 is 12565221131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13112256521 - 2²² = 13108062217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13112256511) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 72045275 + ... + 72045456.

It is an arithmetic number, because the mean of its divisors is an integer number (2017270248).

Almost surely, 2^13112256521 is an apocalyptic number.

It is an amenable number.

13112256521 is a deficient number, since it is larger than the sum of its proper divisors (3025905463).

13112256521 is a wasteful number, since it uses less digits than its factorization.

13112256521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144090751.

The product of its digits is 3600, while the sum is 29.

Adding to 13112256521 its reverse (12565221131), we get a palindrome (25677477652).

The spelling of 13112256521 in words is "thirteen billion, one hundred twelve million, two hundred fifty-six thousand, five hundred twenty-one".