123213231112 has 32 divisors (see below), whose sum is σ = 233452399320. Its totient is φ = 60959508480.

The previous prime is 123213231109. The next prime is 123213231133. The reversal of 123213231112 is 211132312321.

It can be written as a sum of positive squares in 4 ways, for example, as 38877586276 + 84335644836 = 197174^2 + 290406^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4951662 + ... + 4976482.

Almost surely, 2^123213231112 is an apocalyptic number.

It is an amenable number.

123213231112 is a deficient number, since it is larger than the sum of its proper divisors (110239168208).

123213231112 is a wasteful number, since it uses less digits than its factorization.

123213231112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31321 (or 31317 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 123213231112 its reverse (211132312321), we get a palindrome (334345543433).

The spelling of 123213231112 in words is "one hundred twenty-three billion, two hundred thirteen million, two hundred thirty-one thousand, one hundred twelve".