122690148209 has 2 divisors, whose sum is σ = 122690148210. Its totient is φ = 122690148208.

The previous prime is 122690148173. The next prime is 122690148239. The reversal of 122690148209 is 902841096221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120025523809 + 2664624400 = 346447^2 + 51620^2 .

It is a cyclic number.

It is not a de Polignac number, because 122690148209 - 2¹⁶ = 122690082673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122690148209.

It is not a weakly prime, because it can be changed into another prime (122690148239) 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, 61345074104 + 61345074105.

It is an arithmetic number, because the mean of its divisors is an integer number (61345074105).

Almost surely, 2^122690148209 is an apocalyptic number.

It is an amenable number.

122690148209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122690148209 is an equidigital number, since it uses as much as digits as its factorization.

122690148209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 122690148209 in words is "one hundred twenty-two billion, six hundred ninety million, one hundred forty-eight thousand, two hundred nine".