111122222987 has 2 divisors, whose sum is σ = 111122222988. Its totient is φ = 111122222986.

The previous prime is 111122222971. The next prime is 111122223053. The reversal of 111122222987 is 789222221111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111122222987 - 2⁴ = 111122222971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111122222987.

It is not a weakly prime, because it can be changed into another prime (111122222587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561111493 + 55561111494.

It is an arithmetic number, because the mean of its divisors is an integer number (55561111494).

Almost surely, 2^111122222987 is an apocalyptic number.

111122222987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111122222987 is an equidigital number, since it uses as much as digits as its factorization.

111122222987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 38.

The spelling of 111122222987 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, nine hundred eighty-seven".