12123101112 has 32 divisors (see below), whose sum is σ = 31012586880. Its totient is φ = 3947055840.

The previous prime is 12123101077. The next prime is 12123101161. The reversal of 12123101112 is 21110132121.

It is a junction number, because it is equal to n+sod(n) for n = 12123101091 and 12123101100.

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, 5872564 + ... + 5874627.

It is an arithmetic number, because the mean of its divisors is an integer number (969143340).

Almost surely, 2^12123101112 is an apocalyptic number.

12123101112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12123101112 is an abundant number, since it is smaller than the sum of its proper divisors (18889485768).

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

12123101112 is a wasteful number, since it uses less digits than its factorization.

12123101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11747243 (or 11747239 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12123101112 its reverse (21110132121), we get a palindrome (33233233233).

The spelling of 12123101112 in words is "twelve billion, one hundred twenty-three million, one hundred one thousand, one hundred twelve".