202301102320021 has 2 divisors, whose sum is σ = 202301102320022. Its totient is φ = 202301102320020.

The previous prime is 202301102320019. The next prime is 202301102320061. The reversal of 202301102320021 is 120023201103202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125135858179396 + 77165244140625 = 11186414^2 + 8784375^2 .

It is a cyclic number.

It is not a de Polignac number, because 202301102320021 - 2¹ = 202301102320019 is a prime.

Together with 202301102320019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202301102320061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101150551160010 + 101150551160011.

It is an arithmetic number, because the mean of its divisors is an integer number (101150551160011).

Almost surely, 2^{202301102320021} is an apocalyptic number.

It is an amenable number.

202301102320021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202301102320021 is an equidigital number, since it uses as much as digits as its factorization.

202301102320021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 202301102320021 its reverse (120023201103202), we get a palindrome (322324303423223).

The spelling of 202301102320021 in words is "two hundred two trillion, three hundred one billion, one hundred two million, three hundred twenty thousand, twenty-one".