12012111987 has 16 divisors (see below), whose sum is σ = 16048435200. Its totient is φ = 7991952192.

The previous prime is 12012111983. The next prime is 12012111989. The reversal of 12012111987 is 78911121021.

It is not a de Polignac number, because 12012111987 - 2² = 12012111983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12012111983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4560823 + ... + 4563455.

It is an arithmetic number, because the mean of its divisors is an integer number (1003027200).

Almost surely, 2^12012111987 is an apocalyptic number.

12012111987 is a deficient number, since it is larger than the sum of its proper divisors (4036323213).

12012111987 is a wasteful number, since it uses less digits than its factorization.

12012111987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122.

The product of its (nonzero) digits is 2016, while the sum is 33.

The spelling of 12012111987 in words is "twelve billion, twelve million, one hundred eleven thousand, nine hundred eighty-seven".