999000012021 has 8 divisors (see below), whose sum is σ = 1453090926624. Its totient is φ = 605454552720.

The previous prime is 999000012007. The next prime is 999000012061. The reversal of 999000012021 is 120210000999.

999000012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 999000012021 - 2¹⁰ = 999000010997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 30272727637 = 999000012021 / (9 + 9 + 9 + 0 + 0 + 0 + 0 + 1 + 2 + 0 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999000012061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15136363786 + ... + 15136363851.

It is an arithmetic number, because the mean of its divisors is an integer number (181636365828).

Almost surely, 2^999000012021 is an apocalyptic number.

It is an amenable number.

999000012021 is a deficient number, since it is larger than the sum of its proper divisors (454090914603).

999000012021 is a wasteful number, since it uses less digits than its factorization.

999000012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30272727651.

The product of its (nonzero) digits is 2916, while the sum is 33.

The spelling of 999000012021 in words is "nine hundred ninety-nine billion, twelve thousand, twenty-one".