122440013 has 2 divisors, whose sum is σ = 122440014. Its totient is φ = 122440012.

The previous prime is 122439979. The next prime is 122440033. The reversal of 122440013 is 310044221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90878089 + 31561924 = 9533^2 + 5618^2 .

It is an emirp because it is prime and its reverse (310044221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122440013 - 2¹⁰ = 122438989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122439973 and 122440000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122440033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61220006 + 61220007.

It is an arithmetic number, because the mean of its divisors is an integer number (61220007).

Almost surely, 2^122440013 is an apocalyptic number.

It is an amenable number.

122440013 is a deficient number, since it is larger than the sum of its proper divisors (1).

122440013 is an equidigital number, since it uses as much as digits as its factorization.

122440013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 122440013 is about 11065.2615423224. The cubic root of 122440013 is about 496.5631137554.

Adding to 122440013 its reverse (310044221), we get a palindrome (432484234).

The spelling of 122440013 in words is "one hundred twenty-two million, four hundred forty thousand, thirteen".