12111887712 has 48 divisors (see below), whose sum is σ = 31799416320. Its totient is φ = 4036570752.

The previous prime is 12111887707. The next prime is 12111887741. The reversal of 12111887712 is 21778811121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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, 938133 + ... + 950955.

It is an arithmetic number, because the mean of its divisors is an integer number (662487840).

Almost surely, 2^12111887712 is an apocalyptic number.

12111887712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111887712 is an abundant number, since it is smaller than the sum of its proper divisors (19687528608).

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

12111887712 is a wasteful number, since it uses less digits than its factorization.

12111887712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22675 (or 22667 counting only the distinct ones).

The product of its digits is 12544, while the sum is 39.

The spelling of 12111887712 in words is "twelve billion, one hundred eleven million, eight hundred eighty-seven thousand, seven hundred twelve".