321213023 has 4 divisors (see below), whose sum is σ = 321493248. Its totient is φ = 320932800.

The previous prime is 321212999. The next prime is 321213029. The reversal of 321213023 is 320312123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320312123 = 1733 ⋅184831.

It is a cyclic number.

It is not a de Polignac number, because 321213023 - 2¹⁶ = 321147487 is a prime.

It is a super-2 number, since 2×321213023² = 206355612289597058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321212992 and 321213010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321213029) 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, 138386 + ... + 140687.

It is an arithmetic number, because the mean of its divisors is an integer number (80373312).

Almost surely, 2^321213023 is an apocalyptic number.

321213023 is a deficient number, since it is larger than the sum of its proper divisors (280225).

321213023 is a wasteful number, since it uses less digits than its factorization.

321213023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280224.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 321213023 is about 17922.4167734154. The cubic root of 321213023 is about 684.8535556373.

Adding to 321213023 its reverse (320312123), we get a palindrome (641525146).

The spelling of 321213023 in words is "three hundred twenty-one million, two hundred thirteen thousand, twenty-three".