123213112 has 32 divisors (see below), whose sum is σ = 260722800. Its totient is φ = 54073600.

The previous prime is 123213091. The next prime is 123213137. The reversal of 123213112 is 211312321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21589 + ... + 26692.

Almost surely, 2^123213112 is an apocalyptic number.

It is an amenable number.

123213112 is an abundant number, since it is smaller than the sum of its proper divisors (137509688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123213112 is a wasteful number, since it uses less digits than its factorization.

123213112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48327 (or 48323 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 123213112 is about 11100.1401792950. The cubic root of 123213112 is about 497.6060388600.

Adding to 123213112 its reverse (211312321), we get a palindrome (334525433).

The spelling of 123213112 in words is "one hundred twenty-three million, two hundred thirteen thousand, one hundred twelve".