2221168787 has 2 divisors, whose sum is σ = 2221168788. Its totient is φ = 2221168786.

The previous prime is 2221168769. The next prime is 2221168823. The reversal of 2221168787 is 7878611222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221168787 - 2¹⁸ = 2220906643 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221168717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110584393 + 1110584394.

It is an arithmetic number, because the mean of its divisors is an integer number (1110584394).

Almost surely, 2^2221168787 is an apocalyptic number.

2221168787 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221168787 is an equidigital number, since it uses as much as digits as its factorization.

2221168787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 44.

The square root of 2221168787 is about 47129.2773867794. The cubic root of 2221168787 is about 1304.7496448246.

The spelling of 2221168787 in words is "two billion, two hundred twenty-one million, one hundred sixty-eight thousand, seven hundred eighty-seven".