13156226421 has 16 divisors (see below), whose sum is σ = 18903044160. Its totient is φ = 8090974080.

The previous prime is 13156226393. The next prime is 13156226443. The reversal of 13156226421 is 12462265131.

It is not a de Polignac number, because 13156226421 - 2¹⁴ = 13156210037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13156226471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45240 + ... + 168401.

It is an arithmetic number, because the mean of its divisors is an integer number (1181440260).

Almost surely, 2^13156226421 is an apocalyptic number.

It is an amenable number.

13156226421 is a deficient number, since it is larger than the sum of its proper divisors (5746817739).

13156226421 is a wasteful number, since it uses less digits than its factorization.

13156226421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215236.

The product of its digits is 17280, while the sum is 33.

The spelling of 13156226421 in words is "thirteen billion, one hundred fifty-six million, two hundred twenty-six thousand, four hundred twenty-one".