122636213 has 4 divisors (see below), whose sum is σ = 140155680. Its totient is φ = 105116748.

The previous prime is 122636209. The next prime is 122636219. The reversal of 122636213 is 312636221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312636221 = 59 ⋅5298919.

It is a cyclic number.

It is not a de Polignac number, because 122636213 - 2² = 122636209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122636219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8759723 + ... + 8759736.

It is an arithmetic number, because the mean of its divisors is an integer number (35038920).

Almost surely, 2^122636213 is an apocalyptic number.

It is an amenable number.

122636213 is a deficient number, since it is larger than the sum of its proper divisors (17519467).

122636213 is an equidigital number, since it uses as much as digits as its factorization.

122636213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17519466.

The product of its digits is 2592, while the sum is 26.

The square root of 122636213 is about 11074.1235770602. The cubic root of 122636213 is about 496.8282059910.

The spelling of 122636213 in words is "one hundred twenty-two million, six hundred thirty-six thousand, two hundred thirteen".