13219199991 has 12 divisors (see below), whose sum is σ = 19130916168. Its totient is φ = 8795946384.

The previous prime is 13219199969. The next prime is 13219199999. The reversal of 13219199991 is 19999191231.

It is not a de Polignac number, because 13219199991 - 2⁷ = 13219199863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13219199999) 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, 1399500 + ... + 1408913.

It is an arithmetic number, because the mean of its divisors is an integer number (1594243014).

Almost surely, 2^13219199991 is an apocalyptic number.

13219199991 is a deficient number, since it is larger than the sum of its proper divisors (5911716177).

13219199991 is a wasteful number, since it uses less digits than its factorization.

13219199991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808942 (or 2808939 counting only the distinct ones).

The product of its digits is 354294, while the sum is 54.

The spelling of 13219199991 in words is "thirteen billion, two hundred nineteen million, one hundred ninety-nine thousand, nine hundred ninety-one".