10021218989 has 2 divisors, whose sum is σ = 10021218990. Its totient is φ = 10021218988.

The previous prime is 10021218983. The next prime is 10021219027. The reversal of 10021218989 is 98981212001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9422584900 + 598634089 = 97070^2 + 24467^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021218989 - 2¹⁶ = 10021153453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021218983) 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, 5010609494 + 5010609495.

It is an arithmetic number, because the mean of its divisors is an integer number (5010609495).

Almost surely, 2^10021218989 is an apocalyptic number.

It is an amenable number.

10021218989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021218989 is an equidigital number, since it uses as much as digits as its factorization.

10021218989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 41.

The spelling of 10021218989 in words is "ten billion, twenty-one million, two hundred eighteen thousand, nine hundred eighty-nine".