122231509 has 2 divisors, whose sum is σ = 122231510. Its totient is φ = 122231508.

The previous prime is 122231507. The next prime is 122231519. The reversal of 122231509 is 905132221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118330884 + 3900625 = 10878^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 122231509 - 2¹ = 122231507 is a prime.

Together with 122231507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122231507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61115754 + 61115755.

It is an arithmetic number, because the mean of its divisors is an integer number (61115755).

Almost surely, 2^122231509 is an apocalyptic number.

It is an amenable number.

122231509 is a deficient number, since it is larger than the sum of its proper divisors (1).

122231509 is an equidigital number, since it uses as much as digits as its factorization.

122231509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 122231509 is about 11055.8359702014. The cubic root of 122231509 is about 496.2810866114.

The spelling of 122231509 in words is "one hundred twenty-two million, two hundred thirty-one thousand, five hundred nine".