13185619221 has 12 divisors (see below), whose sum is σ = 18554834112. Its totient is φ = 8327758824.

The previous prime is 13185619217. The next prime is 13185619241. The reversal of 13185619221 is 12291658131.

It is not a de Polignac number, because 13185619221 - 2² = 13185619217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13185619221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13185619211) 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, 6086461 + ... + 6088626.

It is an arithmetic number, because the mean of its divisors is an integer number (1546236176).

Almost surely, 2^13185619221 is an apocalyptic number.

It is an amenable number.

13185619221 is a deficient number, since it is larger than the sum of its proper divisors (5369214891).

13185619221 is a wasteful number, since it uses less digits than its factorization.

13185619221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175128 (or 12175109 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The spelling of 13185619221 in words is "thirteen billion, one hundred eighty-five million, six hundred nineteen thousand, two hundred twenty-one".