10012111999 has 4 divisors (see below), whose sum is σ = 10024488720. Its totient is φ = 9999735280.

The previous prime is 10012111979. The next prime is 10012112003. The reversal of 10012111999 is 99911121001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10012111999 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 (10012111909) 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, 6187147 + ... + 6188764.

It is an arithmetic number, because the mean of its divisors is an integer number (2506122180).

Almost surely, 2^10012111999 is an apocalyptic number.

10012111999 is a deficient number, since it is larger than the sum of its proper divisors (12376721).

10012111999 is an equidigital number, since it uses as much as digits as its factorization.

10012111999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12376720.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 10012111999 in words is "ten billion, twelve million, one hundred eleven thousand, nine hundred ninety-nine".