1000009000021 has 8 divisors (see below), whose sum is σ = 1015075707104. Its totient is φ = 984946446000.

The previous prime is 1000009000007. The next prime is 1000009000063. The reversal of 1000009000021 is 1200009000001.

1000009000021 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 a cyclic number.

It is not a de Polignac number, because 1000009000021 - 2¹³ = 1000008991829 is a prime.

It is the 1000005-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000008999965 and 1000009000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000009000091) by changing a digit.

It is a nontrivial repunit in base 1000004.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551355 + ... + 1517896.

It is an arithmetic number, because the mean of its divisors is an integer number (126884463388).

Almost surely, 2^{1000009000021} is an apocalyptic number.

It is an amenable number.

1000009000021 is a deficient number, since it is larger than the sum of its proper divisors (15066707083).

1000009000021 is an equidigital number, since it uses as much as digits as its factorization.

1000009000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076531.

The product of its (nonzero) digits is 18, while the sum is 13.

The spelling of 1000009000021 in words is "one trillion, nine million, twenty-one", and thus it is an aban number and an uban number.