1002221011787 has 2 divisors, whose sum is σ = 1002221011788. Its totient is φ = 1002221011786.

The previous prime is 1002221011741. The next prime is 1002221011807. The reversal of 1002221011787 is 7871101222001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1002221011787 - 2⁶ = 1002221011723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002221011717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501110505893 + 501110505894.

It is an arithmetic number, because the mean of its divisors is an integer number (501110505894).

Almost surely, 2^{1002221011787} is an apocalyptic number.

1002221011787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002221011787 is an equidigital number, since it uses as much as digits as its factorization.

1002221011787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 32.

Adding to 1002221011787 its reverse (7871101222001), we get a palindrome (8873322233788).

The spelling of 1002221011787 in words is "one trillion, two billion, two hundred twenty-one million, eleven thousand, seven hundred eighty-seven".