102012211309 has 2 divisors, whose sum is σ = 102012211310. Its totient is φ = 102012211308.

The previous prime is 102012211271. The next prime is 102012211319. The reversal of 102012211309 is 903112210201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78555757284 + 23456454025 = 280278^2 + 153155^2 .

It is a cyclic number.

It is not a de Polignac number, because 102012211309 - 2⁷ = 102012211181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102012211309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102012211319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51006105654 + 51006105655.

It is an arithmetic number, because the mean of its divisors is an integer number (51006105655).

Almost surely, 2^102012211309 is an apocalyptic number.

It is an amenable number.

102012211309 is a deficient number, since it is larger than the sum of its proper divisors (1).

102012211309 is an equidigital number, since it uses as much as digits as its factorization.

102012211309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 102012211309 in words is "one hundred two billion, twelve million, two hundred eleven thousand, three hundred nine".