321223123 has 4 divisors (see below), whose sum is σ = 345932608. Its totient is φ = 296513640.

The previous prime is 321223121. The next prime is 321223153. The reversal of 321223123 is 321322123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321223123 - 2¹ = 321223121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321223123.

It is not an unprimeable number, because it can be changed into a prime (321223121) 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, 12354723 + ... + 12354748.

It is an arithmetic number, because the mean of its divisors is an integer number (86483152).

Almost surely, 2^321223123 is an apocalyptic number.

321223123 is a deficient number, since it is larger than the sum of its proper divisors (24709485).

321223123 is a wasteful number, since it uses less digits than its factorization.

321223123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24709484.

The product of its digits is 432, while the sum is 19.

The square root of 321223123 is about 17922.6985412354. The cubic root of 321223123 is about 684.8607335825.

Adding to 321223123 its reverse (321322123), we get a palindrome (642545246).

It can be divided in two parts, 32122 and 3123, that added together give a triangular number (35245 = T₂₆₅).

The spelling of 321223123 in words is "three hundred twenty-one million, two hundred twenty-three thousand, one hundred twenty-three".