12111102312 has 16 divisors (see below), whose sum is σ = 30277755840. Its totient is φ = 4037034096.

The previous prime is 12111102287. The next prime is 12111102317. The reversal of 12111102312 is 21320111121.

It is a junction number, because it is equal to n+sod(n) for n = 12111102291 and 12111102300.

It is not an unprimeable number, because it can be changed into a prime (12111102317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252314608 + ... + 252314655.

It is an arithmetic number, because the mean of its divisors is an integer number (1892359740).

Almost surely, 2^12111102312 is an apocalyptic number.

12111102312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111102312 is an abundant number, since it is smaller than the sum of its proper divisors (18166653528).

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

12111102312 is a wasteful number, since it uses less digits than its factorization.

12111102312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504629272 (or 504629268 counting only the distinct ones).

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

Adding to 12111102312 its reverse (21320111121), we get a palindrome (33431213433).

The spelling of 12111102312 in words is "twelve billion, one hundred eleven million, one hundred two thousand, three hundred twelve".