220432121 has 16 divisors (see below), whose sum is σ = 271891200. Its totient is φ = 174028608.

The previous prime is 220432109. The next prime is 220432123. The reversal of 220432121 is 121234022.

It is not a de Polignac number, because 220432121 - 2²⁶ = 153323257 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220432121.

It is not an unprimeable number, because it can be changed into a prime (220432123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43940 + ... + 48698.

It is an arithmetic number, because the mean of its divisors is an integer number (16993200).

Almost surely, 2^220432121 is an apocalyptic number.

It is an amenable number.

220432121 is a deficient number, since it is larger than the sum of its proper divisors (51459079).

220432121 is a wasteful number, since it uses less digits than its factorization.

220432121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 220432121 is about 14846.9566241705. The cubic root of 220432121 is about 604.0760625596.

Adding to 220432121 its reverse (121234022), we get a palindrome (341666143).

The spelling of 220432121 in words is "two hundred twenty million, four hundred thirty-two thousand, one hundred twenty-one".