122235721 has 8 divisors (see below), whose sum is σ = 128890080. Its totient is φ = 115603488.

The previous prime is 122235709. The next prime is 122235739. The reversal of 122235721 is 127532221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122235721 - 2⁵ = 122235689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122265721) 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 in 7 ways as a sum of consecutive naturals, for example, 6510 + ... + 16936.

It is an arithmetic number, because the mean of its divisors is an integer number (16111260).

Almost surely, 2^122235721 is an apocalyptic number.

It is an amenable number.

122235721 is a deficient number, since it is larger than the sum of its proper divisors (6654359).

122235721 is a wasteful number, since it uses less digits than its factorization.

122235721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11063.

The product of its digits is 1680, while the sum is 25.

The square root of 122235721 is about 11056.0264561912. The cubic root of 122235721 is about 496.2867870290.

Adding to 122235721 its reverse (127532221), we get a palindrome (249767942).

The spelling of 122235721 in words is "one hundred twenty-two million, two hundred thirty-five thousand, seven hundred twenty-one".