421230440402 has 8 divisors (see below), whose sum is σ = 659317211136. Its totient is φ = 201458036692.

The previous prime is 421230440399. The next prime is 421230440419. The reversal of 421230440402 is 204044032124.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4578591698 + ... + 4578591789.

It is an arithmetic number, because the mean of its divisors is an integer number (82414651392).

Almost surely, 2^421230440402 is an apocalyptic number.

421230440402 is a deficient number, since it is larger than the sum of its proper divisors (238086770734).

421230440402 is a wasteful number, since it uses less digits than its factorization.

421230440402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157183512.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 421230440402 its reverse (204044032124), we get a palindrome (625274472526).

The spelling of 421230440402 in words is "four hundred twenty-one billion, two hundred thirty million, four hundred forty thousand, four hundred two".