221606122 has 8 divisors (see below), whose sum is σ = 332766756. Its totient is φ = 110683872.

The previous prime is 221606093. The next prime is 221606149.

221606122 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 209641441 + 11964681 = 14479^2 + 3459^2 .

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 = 221606093 and 221606102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57253 + ... + 61000.

Almost surely, 2^221606122 is an apocalyptic number.

221606122 is a deficient number, since it is larger than the sum of its proper divisors (111160634).

221606122 is a wasteful number, since it uses less digits than its factorization.

221606122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119192.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 221606122 is about 14886.4408775234. The cubic root of 221606122 is about 605.1465819723.

It can be divided in two parts, 22160 and 6122, that added together give a palindrome (28282).

The spelling of 221606122 in words is "two hundred twenty-one million, six hundred six thousand, one hundred twenty-two".