10021087989889 has 2 divisors, whose sum is σ = 10021087989890. Its totient is φ = 10021087989888.

The previous prime is 10021087989851. The next prime is 10021087989947. The reversal of 10021087989889 is 98898978012001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7828887940225 + 2192200049664 = 2798015^2 + 1480608^2 .

It is an emirp because it is prime and its reverse (98898978012001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10021087989889 - 2²⁷ = 10020953772161 is a prime.

It is not a weakly prime, because it can be changed into another prime (10021087969889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010543994944 + 5010543994945.

It is an arithmetic number, because the mean of its divisors is an integer number (5010543994945).

Almost surely, 2^{10021087989889} is an apocalyptic number.

It is an amenable number.

10021087989889 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021087989889 is an equidigital number, since it uses as much as digits as its factorization.

10021087989889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41803776, while the sum is 70.

The spelling of 10021087989889 in words is "ten trillion, twenty-one billion, eighty-seven million, nine hundred eighty-nine thousand, eight hundred eighty-nine".