202221122002021 has 2 divisors, whose sum is σ = 202221122002022. Its totient is φ = 202221122002020.

The previous prime is 202221122002019. The next prime is 202221122002033. The reversal of 202221122002021 is 120200221122202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201580761951396 + 640360050625 = 14197914^2 + 800225^2 .

It is a cyclic number.

It is not a de Polignac number, because 202221122002021 - 2¹ = 202221122002019 is a prime.

Together with 202221122002019, 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 202221122002021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202221122002091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110561001010 + 101110561001011.

It is an arithmetic number, because the mean of its divisors is an integer number (101110561001011).

Almost surely, 2^{202221122002021} is an apocalyptic number.

It is an amenable number.

202221122002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221122002021 is an equidigital number, since it uses as much as digits as its factorization.

202221122002021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 202221122002021 its reverse (120200221122202), we get a palindrome (322421343124223).

The spelling of 202221122002021 in words is "two hundred two trillion, two hundred twenty-one billion, one hundred twenty-two million, two thousand, twenty-one".