202120204001 has 2 divisors, whose sum is σ = 202120204002. Its totient is φ = 202120204000.

The previous prime is 202120203997. The next prime is 202120204007. The reversal of 202120204001 is 100402021202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101123364001 + 100996840000 = 317999^2 + 317800^2 .

It is a cyclic number.

It is not a de Polignac number, because 202120204001 - 2² = 202120203997 is a prime.

It is not a weakly prime, because it can be changed into another prime (202120204007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060102000 + 101060102001.

It is an arithmetic number, because the mean of its divisors is an integer number (101060102001).

Almost surely, 2^202120204001 is an apocalyptic number.

It is an amenable number.

202120204001 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120204001 is an equidigital number, since it uses as much as digits as its factorization.

202120204001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 202120204001 its reverse (100402021202), we get a palindrome (302522225203).

The spelling of 202120204001 in words is "two hundred two billion, one hundred twenty million, two hundred four thousand, one".