12712161999 has 4 divisors (see below), whose sum is σ = 16949549336. Its totient is φ = 8474774664.

The previous prime is 12712161991. The next prime is 12712162079. The reversal of 12712161999 is 99916121721.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12712161999 - 2³ = 12712161991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12712161991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118693664 + ... + 2118693669.

It is an arithmetic number, because the mean of its divisors is an integer number (4237387334).

Almost surely, 2^12712161999 is an apocalyptic number.

12712161999 is a deficient number, since it is larger than the sum of its proper divisors (4237387337).

12712161999 is an equidigital number, since it uses as much as digits as its factorization.

12712161999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237387336.

The product of its digits is 122472, while the sum is 48.

The spelling of 12712161999 in words is "twelve billion, seven hundred twelve million, one hundred sixty-one thousand, nine hundred ninety-nine".