2020021000121 has 16 divisors (see below), whose sum is σ = 2207005632720. Its totient is φ = 1841286635520.

The previous prime is 2020021000093. The next prime is 2020021000147. The reversal of 2020021000121 is 1210001200202.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 358657254400 + 1661363745721 = 598880^2 + 1288939^2 .

It is not a de Polignac number, because 2020021000121 - 2⁶ = 2020021000057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020021000721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10481756 + ... + 10672733.

It is an arithmetic number, because the mean of its divisors is an integer number (137937852045).

Almost surely, 2^{2020021000121} is an apocalyptic number.

It is an amenable number.

2020021000121 is a deficient number, since it is larger than the sum of its proper divisors (186984632599).

2020021000121 is a wasteful number, since it uses less digits than its factorization.

2020021000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21154684.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2020021000121 its reverse (1210001200202), we get a palindrome (3230022200323).

The spelling of 2020021000121 in words is "two trillion, twenty billion, twenty-one million, one hundred twenty-one", and thus it is an aban number.