12111142187 has 2 divisors, whose sum is σ = 12111142188. Its totient is φ = 12111142186.

The previous prime is 12111142171. The next prime is 12111142231. The reversal of 12111142187 is 78124111121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12111142187 - 2⁴ = 12111142171 is a prime.

It is a super-3 number, since 3×12111142187³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (12111142387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055571093 + 6055571094.

It is an arithmetic number, because the mean of its divisors is an integer number (6055571094).

Almost surely, 2^12111142187 is an apocalyptic number.

12111142187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111142187 is an equidigital number, since it uses as much as digits as its factorization.

12111142187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 29.

The spelling of 12111142187 in words is "twelve billion, one hundred eleven million, one hundred forty-two thousand, one hundred eighty-seven".