999010111001 has 12 divisors (see below), whose sum is σ = 1162183598352. Its totient is φ = 856242952488.

The previous prime is 999010110971. The next prime is 999010111007. The reversal of 999010111001 is 100111010999.

It is not a de Polignac number, because 999010111001 - 2²² = 999005916697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999010111007) 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, 223466 + ... + 1431068.

It is an arithmetic number, because the mean of its divisors is an integer number (96848633196).

Almost surely, 2^999010111001 is an apocalyptic number.

It is an amenable number.

999010111001 is a deficient number, since it is larger than the sum of its proper divisors (163173487351).

999010111001 is a wasteful number, since it uses less digits than its factorization.

999010111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224500 (or 1224493 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 32.

The spelling of 999010111001 in words is "nine hundred ninety-nine billion, ten million, one hundred eleven thousand, one".