111287866049 has 2 divisors, whose sum is σ = 111287866050. Its totient is φ = 111287866048.

The previous prime is 111287866013. The next prime is 111287866051. The reversal of 111287866049 is 940668782111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111195571600 + 92294449 = 333460^2 + 9607^2 .

It is a cyclic number.

It is not a de Polignac number, because 111287866049 - 2²⁴ = 111271088833 is a prime.

Together with 111287866051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111287866849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55643933024 + 55643933025.

It is an arithmetic number, because the mean of its divisors is an integer number (55643933025).

Almost surely, 2^111287866049 is an apocalyptic number.

It is an amenable number.

111287866049 is a deficient number, since it is larger than the sum of its proper divisors (1).

111287866049 is an equidigital number, since it uses as much as digits as its factorization.

111287866049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The spelling of 111287866049 in words is "one hundred eleven billion, two hundred eighty-seven million, eight hundred sixty-six thousand, forty-nine".