421222225906717 has 2 divisors, whose sum is σ = 421222225906718. Its totient is φ = 421222225906716.

The previous prime is 421222225906697. The next prime is 421222225906829. The reversal of 421222225906717 is 717609522222124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409929225330681 + 11293000576036 = 20246709^2 + 3360506^2 .

It is a cyclic number.

It is not a de Polignac number, because 421222225906717 - 2²⁷ = 421222091688989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421222225906217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210611112953358 + 210611112953359.

It is an arithmetic number, because the mean of its divisors is an integer number (210611112953359).

Almost surely, 2^{421222225906717} is an apocalyptic number.

It is an amenable number.

421222225906717 is a deficient number, since it is larger than the sum of its proper divisors (1).

421222225906717 is an equidigital number, since it uses as much as digits as its factorization.

421222225906717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 421222225906717 in words is "four hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty-five million, nine hundred six thousand, seven hundred seventeen".