123204457321 has 4 divisors (see below), whose sum is σ = 134404862544. Its totient is φ = 112004052100.

The previous prime is 123204457309. The next prime is 123204457339. The reversal of 123204457321 is 123754402321.

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 123204457321 - 2⁷ = 123204457193 is a prime.

It is a super-2 number, since 2×123204457321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123204457361) 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, 5600202595 + ... + 5600202616.

It is an arithmetic number, because the mean of its divisors is an integer number (33601215636).

Almost surely, 2^123204457321 is an apocalyptic number.

123204457321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123204457321 is a deficient number, since it is larger than the sum of its proper divisors (11200405223).

123204457321 is a wasteful number, since it uses less digits than its factorization.

123204457321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11200405222.

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 123204457321 its reverse (123754402321), we get a palindrome (246958859642).

The spelling of 123204457321 in words is "one hundred twenty-three billion, two hundred four million, four hundred fifty-seven thousand, three hundred twenty-one".