220122221 has 8 divisors (see below), whose sum is σ = 244070688. Its totient is φ = 196830000.

The previous prime is 220122181. The next prime is 220122233. The reversal of 220122221 is 122221022.

220122221 = T₄₅₁ + T₄₅₂ + ... + T₁₁₂₁.

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 220122221 - 2⁶ = 220122157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220122196 and 220122205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220122241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163355 + ... + 164696.

It is an arithmetic number, because the mean of its divisors is an integer number (30508836).

Almost surely, 2^220122221 is an apocalyptic number.

It is an amenable number.

220122221 is a deficient number, since it is larger than the sum of its proper divisors (23948467).

220122221 is a wasteful number, since it uses less digits than its factorization.

220122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328123.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 220122221 is about 14836.5164711936. The cubic root of 220122221 is about 603.7928446577.

Adding to 220122221 its reverse (122221022), we get a palindrome (342343243).

The spelling of 220122221 in words is "two hundred twenty million, one hundred twenty-two thousand, two hundred twenty-one".