12111031999 has 16 divisors (see below), whose sum is σ = 14066541216. Its totient is φ = 10305100800.

The previous prime is 12111031991. The next prime is 12111032069. The reversal of 12111031999 is 99913011121.

It is not a de Polignac number, because 12111031999 - 2³ = 12111031991 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 (12111031991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145062 + ... + 212755.

It is an arithmetic number, because the mean of its divisors is an integer number (879158826).

Almost surely, 2^12111031999 is an apocalyptic number.

12111031999 is a deficient number, since it is larger than the sum of its proper divisors (1955509217).

12111031999 is a wasteful number, since it uses less digits than its factorization.

12111031999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358026.

The product of its (nonzero) digits is 4374, while the sum is 37.

The spelling of 12111031999 in words is "twelve billion, one hundred eleven million, thirty-one thousand, nine hundred ninety-nine".