2020202121021 has 32 divisors (see below), whose sum is σ = 3260190885888. Its totient is φ = 1087729093440.

The previous prime is 2020202121019. The next prime is 2020202121043. The reversal of 2020202121021 is 1201212020202.

It is not a de Polignac number, because 2020202121021 - 2¹ = 2020202121019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020202123021) 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, 31181170 + ... + 31245891.

It is an arithmetic number, because the mean of its divisors is an integer number (101880965184).

Almost surely, 2^{2020202121021} is an apocalyptic number.

2020202121021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2020202121021 is a deficient number, since it is larger than the sum of its proper divisors (1239988764867).

2020202121021 is a wasteful number, since it uses less digits than its factorization.

2020202121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62427161.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2020202121021 its reverse (1201212020202), we get a palindrome (3221414141223).

The spelling of 2020202121021 in words is "two trillion, twenty billion, two hundred two million, one hundred twenty-one thousand, twenty-one".