220122009 has 32 divisors (see below), whose sum is σ = 336960000. Its totient is φ = 141939072.

The previous prime is 220121999. The next prime is 220122017. The reversal of 220122009 is 900221022.

It is not a de Polignac number, because 220122009 - 2¹² = 220117913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220121982 and 220122000.

It is not an unprimeable number, because it can be changed into a prime (220022009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111967 + ... + 113915.

It is an arithmetic number, because the mean of its divisors is an integer number (10530000).

Almost surely, 2^220122009 is an apocalyptic number.

It is an amenable number.

220122009 is a deficient number, since it is larger than the sum of its proper divisors (116837991).

220122009 is a wasteful number, since it uses less digits than its factorization.

220122009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094 (or 2088 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 220122009 is about 14836.5093266577. The cubic root of 220122009 is about 603.7926508197.

The spelling of 220122009 in words is "two hundred twenty million, one hundred twenty-two thousand, nine".