402421312021204 has 24 divisors (see below), whose sum is σ = 805396541965568. Its totient is φ = 172347579882720.

The previous prime is 402421312021177. The next prime is 402421312021229. The reversal of 402421312021204 is 402120213124204.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4945654332 + ... + 4945735699.

Almost surely, 2^{402421312021204} is an apocalyptic number.

It is an amenable number.

402421312021204 is an abundant number, since it is smaller than the sum of its proper divisors (402975229944364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402421312021204 is a wasteful number, since it uses less digits than its factorization.

402421312021204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9891391495 (or 9891391493 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 402421312021204 its reverse (402120213124204), we get a palindrome (804541525145408).

The spelling of 402421312021204 in words is "four hundred two trillion, four hundred twenty-one billion, three hundred twelve million, twenty-one thousand, two hundred four".