123123213112 has 32 divisors (see below), whose sum is σ = 238549893120. Its totient is φ = 59514023520.

The previous prime is 123123213097. The next prime is 123123213119. The reversal of 123123213112 is 211312321321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123123213119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16888 + ... + 496519.

It is an arithmetic number, because the mean of its divisors is an integer number (7454684160).

Almost surely, 2^123123213112 is an apocalyptic number.

It is an amenable number.

123123213112 is a deficient number, since it is larger than the sum of its proper divisors (115426680008).

123123213112 is a wasteful number, since it uses less digits than its factorization.

123123213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514411 (or 514407 counting only the distinct ones).

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

Adding to 123123213112 its reverse (211312321321), we get a palindrome (334435534433).

The spelling of 123123213112 in words is "one hundred twenty-three billion, one hundred twenty-three million, two hundred thirteen thousand, one hundred twelve".