123231120112 has 20 divisors (see below), whose sum is σ = 238800084120. Its totient is φ = 61605291968.

The previous prime is 123231120091. The next prime is 123231120139. The reversal of 123231120112 is 211021132321.

It is a self number, because there is not a number n which added to its sum of digits gives 123231120112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542278 + ... + 735205.

It is an arithmetic number, because the mean of its divisors is an integer number (11940004206).

Almost surely, 2^123231120112 is an apocalyptic number.

It is an amenable number.

123231120112 is a deficient number, since it is larger than the sum of its proper divisors (115568964008).

123231120112 is a wasteful number, since it uses less digits than its factorization.

123231120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283520 (or 1283514 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123231120112 its reverse (211021132321), we get a palindrome (334252252433).

The spelling of 123231120112 in words is "one hundred twenty-three billion, two hundred thirty-one million, one hundred twenty thousand, one hundred twelve".