102120331309 has 2 divisors, whose sum is σ = 102120331310. Its totient is φ = 102120331308.

The previous prime is 102120331249. The next prime is 102120331331. The reversal of 102120331309 is 903133021201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61486641225 + 40633690084 = 247965^2 + 201578^2 .

It is a cyclic number.

It is not a de Polignac number, because 102120331309 - 2¹⁵ = 102120298541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102120331399) 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, 51060165654 + 51060165655.

It is an arithmetic number, because the mean of its divisors is an integer number (51060165655).

Almost surely, 2^102120331309 is an apocalyptic number.

It is an amenable number.

102120331309 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120331309 is an equidigital number, since it uses as much as digits as its factorization.

102120331309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 102120331309 in words is "one hundred two billion, one hundred twenty million, three hundred thirty-one thousand, three hundred nine".