321231220233101 has 4 divisors (see below), whose sum is σ = 321755251588092. Its totient is φ = 320707188878112.

The previous prime is 321231220233059. The next prime is 321231220233149. The reversal of 321231220233101 is 101332022132123.

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

It can be written as a sum of positive squares in 2 ways, for example, as 71824184257225 + 249407035975876 = 8474915^2 + 15792626^2 .

It is a cyclic number.

It is not a de Polignac number, because 321231220233101 - 2⁶ = 321231220233037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321231220239101) 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, 262015676576 + ... + 262015677801.

It is an arithmetic number, because the mean of its divisors is an integer number (80438812897023).

Almost surely, 2^{321231220233101} is an apocalyptic number.

It is an amenable number.

321231220233101 is a deficient number, since it is larger than the sum of its proper divisors (524031354991).

321231220233101 is an equidigital number, since it uses as much as digits as its factorization.

321231220233101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524031354990.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 321231220233101 its reverse (101332022132123), we get a palindrome (422563242365224).

The spelling of 321231220233101 in words is "three hundred twenty-one trillion, two hundred thirty-one billion, two hundred twenty million, two hundred thirty-three thousand, one hundred one".