221646122 has 8 divisors (see below), whose sum is σ = 332535456. Its totient is φ = 110800972.

The previous prime is 221646121. The next prime is 221646133.

221646122 is nontrivially palindromic in base 10.

221646122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 221646091 and 221646100.

It is not an unprimeable number, because it can be changed into a prime (221646121) 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 3 ways as a sum of consecutive naturals, for example, 8213 + ... + 22599.

It is an arithmetic number, because the mean of its divisors is an integer number (41566932).

Almost surely, 2^221646122 is an apocalyptic number.

221646122 is a deficient number, since it is larger than the sum of its proper divisors (110889334).

221646122 is a wasteful number, since it uses less digits than its factorization.

221646122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22092.

The product of its digits is 2304, while the sum is 26.

The square root of 221646122 is about 14887.7843213824. The cubic root of 221646122 is about 605.1829895210.

The spelling of 221646122 in words is "two hundred twenty-one million, six hundred forty-six thousand, one hundred twenty-two".