231222323129 has 12 divisors (see below), whose sum is σ = 269154606708. Its totient is φ = 198056678400.

The previous prime is 231222323117. The next prime is 231222323131. The reversal of 231222323129 is 921323222132.

It can be written as a sum of positive squares in 2 ways, for example, as 190861513129 + 40360810000 = 436877^2 + 200900^2 .

It is a de Polignac number, because none of the positive numbers 2^k-231222323129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231222323095 and 231222323104.

It is not an unprimeable number, because it can be changed into a prime (231222323729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1520552 + ... + 1665689.

It is an arithmetic number, because the mean of its divisors is an integer number (22429550559).

Almost surely, 2^231222323129 is an apocalyptic number.

It is an amenable number.

231222323129 is a deficient number, since it is larger than the sum of its proper divisors (37932283579).

231222323129 is a wasteful number, since it uses less digits than its factorization.

231222323129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187736 (or 3187729 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The spelling of 231222323129 in words is "two hundred thirty-one billion, two hundred twenty-two million, three hundred twenty-three thousand, one hundred twenty-nine".