10021219987 has 2 divisors, whose sum is σ = 10021219988. Its totient is φ = 10021219986.

The previous prime is 10021219979. The next prime is 10021220003. The reversal of 10021219987 is 78991212001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10021219987 - 2³ = 10021219979 is a prime.

It is not a weakly prime, because it can be changed into another prime (10021219907) 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, 5010609993 + 5010609994.

It is an arithmetic number, because the mean of its divisors is an integer number (5010609994).

Almost surely, 2^10021219987 is an apocalyptic number.

10021219987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021219987 is an equidigital number, since it uses as much as digits as its factorization.

10021219987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 10021219987 in words is "ten billion, twenty-one million, two hundred nineteen thousand, nine hundred eighty-seven".