421333321 has 16 divisors (see below), whose sum is σ = 451160064. Its totient is φ = 392097024.

The previous prime is 421333309. The next prime is 421333327. The reversal of 421333321 is 123333124.

It is a cyclic number.

It is not a de Polignac number, because 421333321 - 2⁷ = 421333193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421333292 and 421333301.

It is not an unprimeable number, because it can be changed into a prime (421333327) 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, 1061095 + ... + 1061491.

It is an arithmetic number, because the mean of its divisors is an integer number (28197504).

Almost surely, 2^421333321 is an apocalyptic number.

It is an amenable number.

421333321 is a deficient number, since it is larger than the sum of its proper divisors (29826743).

421333321 is a wasteful number, since it uses less digits than its factorization.

421333321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its digits is 1296, while the sum is 22.

The square root of 421333321 is about 20526.4054573615. The cubic root of 421333321 is about 749.6788675553.

Adding to 421333321 its reverse (123333124), we get a palindrome (544666445).

It can be divided in two parts, 42133 and 3321, that added together give a palindrome (45454).

The spelling of 421333321 in words is "four hundred twenty-one million, three hundred thirty-three thousand, three hundred twenty-one".