202101301222021 has 2 divisors, whose sum is σ = 202101301222022. Its totient is φ = 202101301222020.

The previous prime is 202101301222019. The next prime is 202101301222031. The reversal of 202101301222021 is 120222103101202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121897365629796 + 80203935592225 = 11040714^2 + 8955665^2 .

It is a cyclic number.

It is not a de Polignac number, because 202101301222021 - 2¹ = 202101301222019 is a prime.

Together with 202101301222019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 202101301222021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202101301222001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050650611010 + 101050650611011.

It is an arithmetic number, because the mean of its divisors is an integer number (101050650611011).

Almost surely, 2^{202101301222021} is an apocalyptic number.

It is an amenable number.

202101301222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202101301222021 is an equidigital number, since it uses as much as digits as its factorization.

202101301222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 202101301222021 its reverse (120222103101202), we get a palindrome (322323404323223).

The spelling of 202101301222021 in words is "two hundred two trillion, one hundred one billion, three hundred one million, two hundred twenty-two thousand, twenty-one".