102020221189 has 2 divisors, whose sum is σ = 102020221190. Its totient is φ = 102020221188.

The previous prime is 102020221183. The next prime is 102020221201. The reversal of 102020221189 is 981122020201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92653272100 + 9366949089 = 304390^2 + 96783^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020221189 - 2⁹ = 102020220677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020221183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010110594 + 51010110595.

It is an arithmetic number, because the mean of its divisors is an integer number (51010110595).

Almost surely, 2^102020221189 is an apocalyptic number.

It is an amenable number.

102020221189 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020221189 is an equidigital number, since it uses as much as digits as its factorization.

102020221189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 102020221189 in words is "one hundred two billion, twenty million, two hundred twenty-one thousand, one hundred eighty-nine".