421444022999 has 4 divisors (see below), whose sum is σ = 425616736200. Its totient is φ = 417271309800.

The previous prime is 421444022957. The next prime is 421444023017. The reversal of 421444022999 is 999220444124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421444022999 - 2¹² = 421444018903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421444022599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2086356449 + ... + 2086356650.

It is an arithmetic number, because the mean of its divisors is an integer number (106404184050).

Almost surely, 2^421444022999 is an apocalyptic number.

421444022999 is a deficient number, since it is larger than the sum of its proper divisors (4172713201).

421444022999 is a wasteful number, since it uses less digits than its factorization.

421444022999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4172713200.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 421444022999 in words is "four hundred twenty-one billion, four hundred forty-four million, twenty-two thousand, nine hundred ninety-nine".