2021000121019 has 12 divisors (see below), whose sum is σ = 2223689863248. Its totient is φ = 1835403682640.

The previous prime is 2021000120987. The next prime is 2021000121031. The reversal of 2021000121019 is 9101210001202.

It is a happy number.

It is not a de Polignac number, because 2021000121019 - 2⁵ = 2021000120987 is a prime.

It is a super-2 number, since 2×2021000121019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021000120987 and 2021000121005.

It is not an unprimeable number, because it can be changed into a prime (2021000121919) 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, 8376724 + ... + 8614609.

It is an arithmetic number, because the mean of its divisors is an integer number (185307488604).

Almost surely, 2^{2021000121019} is an apocalyptic number.

2021000121019 is a deficient number, since it is larger than the sum of its proper divisors (202689742229).

2021000121019 is a wasteful number, since it uses less digits than its factorization.

2021000121019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16992338 (or 16992327 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 2021000121019 in words is "two trillion, twenty-one billion, one hundred twenty-one thousand, nineteen".