13138486221 has 32 divisors (see below), whose sum is σ = 20719872000. Its totient is φ = 7245685440.

The previous prime is 13138486189. The next prime is 13138486223. The reversal of 13138486221 is 12268483131.

It is not a de Polignac number, because 13138486221 - 2⁵ = 13138486189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13138486221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138486223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2574130 + ... + 2579228.

It is an arithmetic number, because the mean of its divisors is an integer number (647496000).

Almost surely, 2^13138486221 is an apocalyptic number.

It is an amenable number.

13138486221 is a deficient number, since it is larger than the sum of its proper divisors (7581385779).

13138486221 is a wasteful number, since it uses less digits than its factorization.

13138486221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9369.

The product of its digits is 55296, while the sum is 39.

The spelling of 13138486221 in words is "thirteen billion, one hundred thirty-eight million, four hundred eighty-six thousand, two hundred twenty-one".