2021202010021 has 16 divisors (see below), whose sum is σ = 2141954049600. Its totient is φ = 1901896633728.

The previous prime is 2021202010019. The next prime is 2021202010031. The reversal of 2021202010021 is 1200102021202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2021202010021 - 2¹ = 2021202010019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021202009983 and 2021202010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021202010031) 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, 7725570 + ... + 7982908.

It is an arithmetic number, because the mean of its divisors is an integer number (133872128100).

Almost surely, 2^{2021202010021} is an apocalyptic number.

It is an amenable number.

2021202010021 is a deficient number, since it is larger than the sum of its proper divisors (120752039579).

2021202010021 is a wasteful number, since it uses less digits than its factorization.

2021202010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260148.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2021202010021 its reverse (1200102021202), we get a palindrome (3221304031223).

The spelling of 2021202010021 in words is "two trillion, twenty-one billion, two hundred two million, ten thousand, twenty-one".