123321012231 has 16 divisors (see below), whose sum is σ = 168266001024. Its totient is φ = 80295335904.

The previous prime is 123321012223. The next prime is 123321012259. The reversal of 123321012231 is 132210123321.

It is not a de Polignac number, because 123321012231 - 2³ = 123321012223 is a prime.

It is a super-2 number, since 2×123321012231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123321012198 and 123321012207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123321012211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1854205 + ... + 1919561.

It is an arithmetic number, because the mean of its divisors is an integer number (10516625064).

Almost surely, 2^123321012231 is an apocalyptic number.

123321012231 is a deficient number, since it is larger than the sum of its proper divisors (44944988793).

123321012231 is a wasteful number, since it uses less digits than its factorization.

123321012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80030.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123321012231 its reverse (132210123321), we get a palindrome (255531135552).

The spelling of 123321012231 in words is "one hundred twenty-three billion, three hundred twenty-one million, twelve thousand, two hundred thirty-one".