2000120020021 has 4 divisors (see below), whose sum is σ = 2007555410700. Its totient is φ = 1992684629344.

The previous prime is 2000120019983. The next prime is 2000120020039. The reversal of 2000120020021 is 1200200210002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1079458660900 + 920661359121 = 1038970^2 + 959511^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000120020021 - 2⁷ = 2000120019893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000120020051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3717694936 + ... + 3717695473.

It is an arithmetic number, because the mean of its divisors is an integer number (501888852675).

Almost surely, 2^{2000120020021} is an apocalyptic number.

It is an amenable number.

2000120020021 is a deficient number, since it is larger than the sum of its proper divisors (7435390679).

2000120020021 is an equidigital number, since it uses as much as digits as its factorization.

2000120020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7435390678.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2000120020021 its reverse (1200200210002), we get a palindrome (3200320230023).

The spelling of 2000120020021 in words is "two trillion, one hundred twenty million, twenty thousand, twenty-one".