10021000999987 has 2 divisors, whose sum is σ = 10021000999988. Its totient is φ = 10021000999986.

The previous prime is 10021000999913. The next prime is 10021001000033. The reversal of 10021000999987 is 78999900012001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10021000999987 - 2⁷ = 10021000999859 is a prime.

It is a super-2 number, since 2×10021000999987² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10021000999687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010500499993 + 5010500499994.

It is an arithmetic number, because the mean of its divisors is an integer number (5010500499994).

Almost surely, 2^{10021000999987} is an apocalyptic number.

10021000999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021000999987 is an equidigital number, since it uses as much as digits as its factorization.

10021000999987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 55.

The spelling of 10021000999987 in words is "ten trillion, twenty-one billion, nine hundred ninety-nine thousand, nine hundred eighty-seven".