102122121209 has 2 divisors, whose sum is σ = 102122121210. Its totient is φ = 102122121208.

The previous prime is 102122121169. The next prime is 102122121263. The reversal of 102122121209 is 902121221201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59592133225 + 42529987984 = 244115^2 + 206228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102122121209 is a prime.

It is not a weakly prime, because it can be changed into another prime (102122121109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51061060604 + 51061060605.

It is an arithmetic number, because the mean of its divisors is an integer number (51061060605).

Almost surely, 2^102122121209 is an apocalyptic number.

It is an amenable number.

102122121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

102122121209 is an equidigital number, since it uses as much as digits as its factorization.

102122121209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 102122121209 in words is "one hundred two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred nine".