123011112 has 32 divisors (see below), whose sum is σ = 351460800. Its totient is φ = 35145984.

The previous prime is 123011081. The next prime is 123011113. The reversal of 123011112 is 211110321.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (123011113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365937 + ... + 366272.

It is an arithmetic number, because the mean of its divisors is an integer number (10983150).

Almost surely, 2^123011112 is an apocalyptic number.

123011112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123011112 is an abundant number, since it is smaller than the sum of its proper divisors (228449688).

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

123011112 is a wasteful number, since it uses less digits than its factorization.

123011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732225 (or 732221 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 123011112 is about 11091.0374627444. The cubic root of 123011112 is about 497.3339590508. Note that the first 3 decimals are identical.

Adding to 123011112 its reverse (211110321), we get a palindrome (334121433).

The spelling of 123011112 in words is "one hundred twenty-three million, eleven thousand, one hundred twelve".