202020001201021 has 32 divisors (see below), whose sum is σ = 232429915238400. Its totient is φ = 174314897130240.

The previous prime is 202020001201009. The next prime is 202020001201127. The reversal of 202020001201021 is 120102100020202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202020001201021 - 2¹⁵ = 202020001168253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202020001200992 and 202020001201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020001201321) 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, 526281666 + ... + 526665388.

It is an arithmetic number, because the mean of its divisors is an integer number (7263434851200).

Almost surely, 2^{202020001201021} is an apocalyptic number.

It is an amenable number.

202020001201021 is a deficient number, since it is larger than the sum of its proper divisors (30409914037379).

202020001201021 is a wasteful number, since it uses less digits than its factorization.

202020001201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436369.

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

Adding to 202020001201021 its reverse (120102100020202), we get a palindrome (322122101221223).

The spelling of 202020001201021 in words is "two hundred two trillion, twenty billion, one million, two hundred one thousand, twenty-one".