102221021210989 has 2 divisors, whose sum is σ = 102221021210990. Its totient is φ = 102221021210988.

The previous prime is 102221021210977. The next prime is 102221021211047. The reversal of 102221021210989 is 989012120122201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81755051422500 + 20465969788489 = 9041850^2 + 4523933^2 .

It is a cyclic number.

It is not a de Polignac number, because 102221021210989 - 2⁴¹ = 100021997955437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102221031210989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110510605494 + 51110510605495.

It is an arithmetic number, because the mean of its divisors is an integer number (51110510605495).

Almost surely, 2^{102221021210989} is an apocalyptic number.

It is an amenable number.

102221021210989 is a deficient number, since it is larger than the sum of its proper divisors (1).

102221021210989 is an equidigital number, since it uses as much as digits as its factorization.

102221021210989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 102221021210989 in words is "one hundred two trillion, two hundred twenty-one billion, twenty-one million, two hundred ten thousand, nine hundred eighty-nine".