321142421 has 4 divisors (see below), whose sum is σ = 323269344. Its totient is φ = 319015500.

The previous prime is 321142411. The next prime is 321142429. The reversal of 321142421 is 124241123.

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 a cyclic number.

It is not a de Polignac number, because 321142421 - 2¹⁸ = 320880277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321142393 and 321142402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321142429) 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, 1063235 + ... + 1063536.

It is an arithmetic number, because the mean of its divisors is an integer number (80817336).

Almost surely, 2^321142421 is an apocalyptic number.

It is an amenable number.

321142421 is a deficient number, since it is larger than the sum of its proper divisors (2126923).

321142421 is a wasteful number, since it uses less digits than its factorization.

321142421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126922.

The product of its digits is 384, while the sum is 20.

The square root of 321142421 is about 17920.4470089337. The cubic root of 321142421 is about 684.8033754658.

Adding to 321142421 its reverse (124241123), we get a palindrome (445383544).

The spelling of 321142421 in words is "three hundred twenty-one million, one hundred forty-two thousand, four hundred twenty-one".