321021423 has 12 divisors (see below), whose sum is σ = 464235408. Its totient is φ = 213766080.

The previous prime is 321021347. The next prime is 321021443. The reversal of 321021423 is 324120123.

It is not a de Polignac number, because 321021423 - 2⁸ = 321021167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321021396 and 321021405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321021443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12315 + ... + 28172.

It is an arithmetic number, because the mean of its divisors is an integer number (38686284).

Almost surely, 2^321021423 is an apocalyptic number.

321021423 is a deficient number, since it is larger than the sum of its proper divisors (143213985).

321021423 is a wasteful number, since it uses less digits than its factorization.

321021423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41374 (or 41371 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 321021423 is about 17917.0707148239. The cubic root of 321021423 is about 684.7173593744.

Adding to 321021423 its reverse (324120123), we get a palindrome (645141546).

The spelling of 321021423 in words is "three hundred twenty-one million, twenty-one thousand, four hundred twenty-three".