421229818369 has 8 divisors (see below), whose sum is σ = 431684136072. Its totient is φ = 410784092160.

The previous prime is 421229818349. The next prime is 421229818381. The reversal of 421229818369 is 963818922124.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 96885900225 + 324343918144 = 311265^2 + 569512^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421229818369 - 2⁵ = 421229818337 is a prime.

It is a super-2 number, since 2×421229818369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421229818349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2048544 + ... + 2244769.

It is an arithmetic number, because the mean of its divisors is an integer number (53960517009).

Almost surely, 2^421229818369 is an apocalyptic number.

It is an amenable number.

421229818369 is a deficient number, since it is larger than the sum of its proper divisors (10454317703).

421229818369 is a wasteful number, since it uses less digits than its factorization.

421229818369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295747.

The product of its digits is 2985984, while the sum is 55.

The spelling of 421229818369 in words is "four hundred twenty-one billion, two hundred twenty-nine million, eight hundred eighteen thousand, three hundred sixty-nine".