13122750521 has 8 divisors (see below), whose sum is σ = 13486878984. Its totient is φ = 12759120000.

The previous prime is 13122750497. The next prime is 13122750547. The reversal of 13122750521 is 12505722131.

It can be written as a sum of positive squares in 4 ways, for example, as 6188024896 + 6934725625 = 78664^2 + 83275^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13122750521 - 2¹⁴ = 13122734137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13122752521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70730 + ... + 176771.

It is an arithmetic number, because the mean of its divisors is an integer number (1685859873).

Almost surely, 2^13122750521 is an apocalyptic number.

It is an amenable number.

13122750521 is a deficient number, since it is larger than the sum of its proper divisors (364128463).

13122750521 is a wasteful number, since it uses less digits than its factorization.

13122750521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248971.

The product of its (nonzero) digits is 4200, while the sum is 29.

The spelling of 13122750521 in words is "thirteen billion, one hundred twenty-two million, seven hundred fifty thousand, five hundred twenty-one".