122716221 has 4 divisors (see below), whose sum is σ = 163621632. Its totient is φ = 81810812.

The previous prime is 122716211. The next prime is 122716229. The reversal of 122716221 is 122617221.

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: 122617221 = 3 ⋅40872407.

It is a cyclic number.

It is not a de Polignac number, because 122716221 - 2⁷ = 122716093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122716191 and 122716200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122716229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20452701 + ... + 20452706.

It is an arithmetic number, because the mean of its divisors is an integer number (40905408).

Almost surely, 2^122716221 is an apocalyptic number.

It is an amenable number.

122716221 is a deficient number, since it is larger than the sum of its proper divisors (40905411).

122716221 is an equidigital number, since it uses as much as digits as its factorization.

122716221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40905410.

The product of its digits is 672, while the sum is 24.

The square root of 122716221 is about 11077.7353732611. The cubic root of 122716221 is about 496.9362262593.

The spelling of 122716221 in words is "one hundred twenty-two million, seven hundred sixteen thousand, two hundred twenty-one".