21222202200091 has 2 divisors, whose sum is σ = 21222202200092. Its totient is φ = 21222202200090.

The previous prime is 21222202200061. The next prime is 21222202200179. The reversal of 21222202200091 is 19000220222212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222202200091 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222202200061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611101100045 + 10611101100046.

It is an arithmetic number, because the mean of its divisors is an integer number (10611101100046).

Almost surely, 2^{21222202200091} is an apocalyptic number.

21222202200091 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222202200091 is an equidigital number, since it uses as much as digits as its factorization.

21222202200091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 21222202200091 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred two million, two hundred thousand, ninety-one".