122224721 has 4 divisors (see below), whose sum is σ = 123697392. Its totient is φ = 120752052.

The previous prime is 122224717. The next prime is 122224741. The reversal of 122224721 is 127422221.

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.

It is not a de Polignac number, because 122224721 - 2² = 122224717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122224741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736211 + ... + 736376.

It is an arithmetic number, because the mean of its divisors is an integer number (30924348).

Almost surely, 2^122224721 is an apocalyptic number.

It is an amenable number.

122224721 is a deficient number, since it is larger than the sum of its proper divisors (1472671).

122224721 is an equidigital number, since it uses as much as digits as its factorization.

122224721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472670.

The product of its digits is 896, while the sum is 23.

The square root of 122224721 is about 11055.5289787509. The cubic root of 122224721 is about 496.2718996230.

Adding to 122224721 its reverse (127422221), we get a palindrome (249646942).

The spelling of 122224721 in words is "one hundred twenty-two million, two hundred twenty-four thousand, seven hundred twenty-one".