421144600321 has 4 divisors (see below), whose sum is σ = 421981866432. Its totient is φ = 420307334212.

The previous prime is 421144600309. The next prime is 421144600333. The reversal of 421144600321 is 123006441124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (421144600309) and next prime (421144600333).

It is a cyclic number.

It is not a de Polignac number, because 421144600321 - 2³³ = 412554665729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421144600321.

It is not an unprimeable number, because it can be changed into a prime (421144600021) 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, 418632301 + ... + 418633306.

It is an arithmetic number, because the mean of its divisors is an integer number (105495466608).

Almost surely, 2^421144600321 is an apocalyptic number.

It is an amenable number.

421144600321 is a deficient number, since it is larger than the sum of its proper divisors (837266111).

421144600321 is an equidigital number, since it uses as much as digits as its factorization.

421144600321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837266110.

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 421144600321 in words is "four hundred twenty-one billion, one hundred forty-four million, six hundred thousand, three hundred twenty-one".