123221330231 has 4 divisors (see below), whose sum is σ = 130469643792. Its totient is φ = 115973016672.

The previous prime is 123221330213. The next prime is 123221330279. The reversal of 123221330231 is 132033122321.

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 123221330231 - 2¹⁰ = 123221329207 is a prime.

It is a super-2 number, since 2×123221330231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123221330197 and 123221330206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221339231) 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, 3624156755 + ... + 3624156788.

It is an arithmetic number, because the mean of its divisors is an integer number (32617410948).

Almost surely, 2^123221330231 is an apocalyptic number.

123221330231 is a deficient number, since it is larger than the sum of its proper divisors (7248313561).

123221330231 is an equidigital number, since it uses as much as digits as its factorization.

123221330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7248313560.

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

Adding to 123221330231 its reverse (132033122321), we get a palindrome (255254452552).

The spelling of 123221330231 in words is "one hundred twenty-three billion, two hundred twenty-one million, three hundred thirty thousand, two hundred thirty-one".