2021022009999 has 32 divisors (see below), whose sum is σ = 3170858201280. Its totient is φ = 1267841203200.

The previous prime is 2021022009989. The next prime is 2021022010069. The reversal of 2021022009999 is 9999002201202.

It is not a de Polignac number, because 2021022009999 - 2³⁵ = 1986662271631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021022009989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1898889 + ... + 2765469.

It is an arithmetic number, because the mean of its divisors is an integer number (99089318790).

Almost surely, 2^{2021022009999} is an apocalyptic number.

2021022009999 is a deficient number, since it is larger than the sum of its proper divisors (1149836191281).

2021022009999 is a wasteful number, since it uses less digits than its factorization.

2021022009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871688 (or 871682 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 2021022009999 in words is "two trillion, twenty-one billion, twenty-two million, nine thousand, nine hundred ninety-nine".