202202222202821 has 2 divisors, whose sum is σ = 202202222202822. Its totient is φ = 202202222202820.

The previous prime is 202202222202817. The next prime is 202202222202839. The reversal of 202202222202821 is 128202222202202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179619340101796 + 22582882101025 = 13402214^2 + 4752145^2 .

It is a cyclic number.

It is not a de Polignac number, because 202202222202821 - 2² = 202202222202817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202202222202811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101101111101410 + 101101111101411.

It is an arithmetic number, because the mean of its divisors is an integer number (101101111101411).

Almost surely, 2^{202202222202821} is an apocalyptic number.

It is an amenable number.

202202222202821 is a deficient number, since it is larger than the sum of its proper divisors (1).

202202222202821 is an equidigital number, since it uses as much as digits as its factorization.

202202222202821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8192, while the sum is 29.

The spelling of 202202222202821 in words is "two hundred two trillion, two hundred two billion, two hundred twenty-two million, two hundred two thousand, eight hundred twenty-one".