421000012321 has 16 divisors (see below), whose sum is σ = 482037508864. Its totient is φ = 360186450624.

The previous prime is 421000012309. The next prime is 421000012343. The reversal of 421000012321 is 123210000124.

It is not a de Polignac number, because 421000012321 - 2²⁷ = 420865794593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421000012295 and 421000012304.

It is not an unprimeable number, because it can be changed into a prime (421000012351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25767871 + ... + 25784203.

It is an arithmetic number, because the mean of its divisors is an integer number (30127344304).

Almost surely, 2^421000012321 is an apocalyptic number.

It is an amenable number.

421000012321 is a deficient number, since it is larger than the sum of its proper divisors (61037496543).

421000012321 is a wasteful number, since it uses less digits than its factorization.

421000012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22960.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 421000012321 its reverse (123210000124), we get a palindrome (544210012445).

The spelling of 421000012321 in words is "four hundred twenty-one billion, twelve thousand, three hundred twenty-one".