1232123112 has 48 divisors (see below), whose sum is σ = 3640366080. Its totient is φ = 373370400.

The previous prime is 1232123069. The next prime is 1232123143. The reversal of 1232123112 is 2113212321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 777064 + ... + 778647.

It is an arithmetic number, because the mean of its divisors is an integer number (75840960).

Almost surely, 2^1232123112 is an apocalyptic number.

1232123112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1232123112 is an abundant number, since it is smaller than the sum of its proper divisors (2408242968).

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

1232123112 is a wasteful number, since it uses less digits than its factorization.

1232123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555734 (or 1555727 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1232123112 is about 35101.6112450696. The cubic root of 1232123112 is about 1072.0573895355.

Adding to 1232123112 its reverse (2113212321), we get a palindrome (3345335433).

The spelling of 1232123112 in words is "one billion, two hundred thirty-two million, one hundred twenty-three thousand, one hundred twelve".