10021099987 has 2 divisors, whose sum is σ = 10021099988. Its totient is φ = 10021099986.

The previous prime is 10021099927. The next prime is 10021100009. The reversal of 10021099987 is 78999012001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10021099987 - 2⁷ = 10021099859 is a prime.

It is not a weakly prime, because it can be changed into another prime (10021099927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010549993 + 5010549994.

It is an arithmetic number, because the mean of its divisors is an integer number (5010549994).

Almost surely, 2^10021099987 is an apocalyptic number.

10021099987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021099987 is an equidigital number, since it uses as much as digits as its factorization.

10021099987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 46.

The spelling of 10021099987 in words is "ten billion, twenty-one million, ninety-nine thousand, nine hundred eighty-seven".