321221330123 has 4 divisors (see below), whose sum is σ = 321222707520. Its totient is φ = 321219952728.

The previous prime is 321221330093. The next prime is 321221330161. The reversal of 321221330123 is 321033122123.

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 321221330123 - 2³⁴ = 304041460939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321221330623) 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, 242540 + ... + 837417.

It is an arithmetic number, because the mean of its divisors is an integer number (80305676880).

Almost surely, 2^321221330123 is an apocalyptic number.

321221330123 is a deficient number, since it is larger than the sum of its proper divisors (1377397).

321221330123 is a wasteful number, since it uses less digits than its factorization.

321221330123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377396.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 321221330123 its reverse (321033122123), we get a palindrome (642254452246).

The spelling of 321221330123 in words is "three hundred twenty-one billion, two hundred twenty-one million, three hundred thirty thousand, one hundred twenty-three".