102020202001021 has 32 divisors (see below), whose sum is σ = 106424209704960. Its totient is φ = 97712091734400.

The previous prime is 102020202000991. The next prime is 102020202001033. The reversal of 102020202001021 is 120100202020201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102020202001021 - 2³⁵ = 101985842262653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102020202000992 and 102020202001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020202001121) 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, 6421607340 + ... + 6421623226.

It is an arithmetic number, because the mean of its divisors is an integer number (3325756553280).

Almost surely, 2^{102020202001021} is an apocalyptic number.

It is an amenable number.

102020202001021 is a deficient number, since it is larger than the sum of its proper divisors (4404007703939).

102020202001021 is a wasteful number, since it uses less digits than its factorization.

102020202001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19425.

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

Adding to 102020202001021 its reverse (120100202020201), we get a palindrome (222120404021222).

The spelling of 102020202001021 in words is "one hundred two trillion, twenty billion, two hundred two million, one thousand, twenty-one".