111222222011987 has 2 divisors, whose sum is σ = 111222222011988. Its totient is φ = 111222222011986.

The previous prime is 111222222011983. The next prime is 111222222012017. The reversal of 111222222011987 is 789110222222111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111222222011987 - 2² = 111222222011983 is a prime.

It is not a weakly prime, because it can be changed into another prime (111222222011983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611111005993 + 55611111005994.

It is an arithmetic number, because the mean of its divisors is an integer number (55611111005994).

Almost surely, 2^{111222222011987} is an apocalyptic number.

111222222011987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222222011987 is an equidigital number, since it uses as much as digits as its factorization.

111222222011987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 111222222011987 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-two million, eleven thousand, nine hundred eighty-seven".