421222369 has 2 divisors, whose sum is σ = 421222370. Its totient is φ = 421222368.

The previous prime is 421222363. The next prime is 421222433. The reversal of 421222369 is 963222124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314885025 + 106337344 = 17745^2 + 10312^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421222369 is a prime.

It is a super-2 number, since 2×421222369² = 354856568291944322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421222369.

It is not a weakly prime, because it can be changed into another prime (421222363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210611184 + 210611185.

It is an arithmetic number, because the mean of its divisors is an integer number (210611185).

Almost surely, 2^421222369 is an apocalyptic number.

It is an amenable number.

421222369 is a deficient number, since it is larger than the sum of its proper divisors (1).

421222369 is an equidigital number, since it uses as much as digits as its factorization.

421222369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 421222369 is about 20523.7026142945. The cubic root of 421222369 is about 749.6130561039.

The spelling of 421222369 in words is "four hundred twenty-one million, two hundred twenty-two thousand, three hundred sixty-nine".