13157721111 has 8 divisors (see below), whose sum is σ = 17916897024. Its totient is φ = 8585179640.

The previous prime is 13157721079. The next prime is 13157721119. The reversal of 13157721111 is 11112775131.

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 13157721111 - 2⁵ = 13157721079 is a prime.

It is a super-4 number, since 4×13157721111⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13157721119) 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, 46658445 + ... + 46658726.

It is an arithmetic number, because the mean of its divisors is an integer number (2239612128).

Almost surely, 2^13157721111 is an apocalyptic number.

13157721111 is a deficient number, since it is larger than the sum of its proper divisors (4759175913).

13157721111 is an equidigital number, since it uses as much as digits as its factorization.

13157721111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93317221.

The product of its digits is 1470, while the sum is 30.

The spelling of 13157721111 in words is "thirteen billion, one hundred fifty-seven million, seven hundred twenty-one thousand, one hundred eleven".