421222230100891 has 2 divisors, whose sum is σ = 421222230100892. Its totient is φ = 421222230100890.

The previous prime is 421222230100787. The next prime is 421222230101021. The reversal of 421222230100891 is 198001032222124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421222230100891 - 2²⁷ = 421222095883163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421222230100891.

It is not a weakly prime, because it can be changed into another prime (421222230140891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210611115050445 + 210611115050446.

It is an arithmetic number, because the mean of its divisors is an integer number (210611115050446).

Almost surely, 2^{421222230100891} is an apocalyptic number.

421222230100891 is a deficient number, since it is larger than the sum of its proper divisors (1).

421222230100891 is an equidigital number, since it uses as much as digits as its factorization.

421222230100891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 421222230100891 in words is "four hundred twenty-one trillion, two hundred twenty-two billion, two hundred thirty million, one hundred thousand, eight hundred ninety-one".