13144117221 has 12 divisors (see below), whose sum is σ = 19019677248. Its totient is φ = 8747177064.

The previous prime is 13144117213. The next prime is 13144117229. The reversal of 13144117221 is 12271144131.

It is a happy number.

13144117221 is a `hidden beast` number, since 1 + 31 + 441 + 172 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (13144117213) and next prime (13144117229).

It is not a de Polignac number, because 13144117221 - 2³ = 13144117213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13144117229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1291965 + ... + 1302098.

It is an arithmetic number, because the mean of its divisors is an integer number (1584973104).

Almost surely, 2^13144117221 is an apocalyptic number.

It is an amenable number.

13144117221 is a deficient number, since it is larger than the sum of its proper divisors (5875560027).

13144117221 is a wasteful number, since it uses less digits than its factorization.

13144117221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594632 (or 2594629 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The spelling of 13144117221 in words is "thirteen billion, one hundred forty-four million, one hundred seventeen thousand, two hundred twenty-one".