102210021989 has 2 divisors, whose sum is σ = 102210021990. Its totient is φ = 102210021988.

The previous prime is 102210021971. The next prime is 102210022001. The reversal of 102210021989 is 989120012201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94597459489 + 7612562500 = 307567^2 + 87250^2 .

It is an emirp because it is prime and its reverse (989120012201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102210021989 is a prime.

It is a super-3 number, since 3×102210021989³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102210021919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51105010994 + 51105010995.

It is an arithmetic number, because the mean of its divisors is an integer number (51105010995).

Almost surely, 2^102210021989 is an apocalyptic number.

It is an amenable number.

102210021989 is a deficient number, since it is larger than the sum of its proper divisors (1).

102210021989 is an equidigital number, since it uses as much as digits as its factorization.

102210021989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 102210021989 in words is "one hundred two billion, two hundred ten million, twenty-one thousand, nine hundred eighty-nine".