122213309 has 2 divisors, whose sum is σ = 122213310. Its totient is φ = 122213308.

The previous prime is 122213303. The next prime is 122213321. The reversal of 122213309 is 903312221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78943225 + 43270084 = 8885^2 + 6578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122213309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122213303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61106654 + 61106655.

It is an arithmetic number, because the mean of its divisors is an integer number (61106655).

Almost surely, 2^122213309 is an apocalyptic number.

It is an amenable number.

122213309 is a deficient number, since it is larger than the sum of its proper divisors (1).

122213309 is an equidigital number, since it uses as much as digits as its factorization.

122213309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 122213309 is about 11055.0128448591. The cubic root of 122213309 is about 496.2564536719.

The spelling of 122213309 in words is "one hundred twenty-two million, two hundred thirteen thousand, three hundred nine".