13038125721 has 8 divisors (see below), whose sum is σ = 17384876160. Its totient is φ = 8691729552.

The previous prime is 13038125719. The next prime is 13038125729. The reversal of 13038125721 is 12752183031.

It is a happy number.

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

It is not a de Polignac number, because 13038125721 - 2¹ = 13038125719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13038125729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14415 + ... + 162123.

It is an arithmetic number, because the mean of its divisors is an integer number (2173109520).

Almost surely, 2^13038125721 is an apocalyptic number.

It is an amenable number.

13038125721 is a deficient number, since it is larger than the sum of its proper divisors (4346750439).

13038125721 is a wasteful number, since it uses less digits than its factorization.

13038125721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177135.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 13038125721 in words is "thirteen billion, thirty-eight million, one hundred twenty-five thousand, seven hundred twenty-one".