202202222221991 has 2 divisors, whose sum is σ = 202202222221992. Its totient is φ = 202202222221990.

The previous prime is 202202222221957. The next prime is 202202222222023. The reversal of 202202222221991 is 199122222202202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202202222221991 - 2²² = 202202218027687 is a prime.

It is a super-2 number, since 2×202202222221991² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202202222221091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101101111110995 + 101101111110996.

It is an arithmetic number, because the mean of its divisors is an integer number (101101111110996).

Almost surely, 2^{202202222221991} is an apocalyptic number.

202202222221991 is a deficient number, since it is larger than the sum of its proper divisors (1).

202202222221991 is an equidigital number, since it uses as much as digits as its factorization.

202202222221991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 202202222221991 in words is "two hundred two trillion, two hundred two billion, two hundred twenty-two million, two hundred twenty-one thousand, nine hundred ninety-one".