220222121 has 12 divisors (see below), whose sum is σ = 256943232. Its totient is φ = 188747412.

The previous prime is 220222087. The next prime is 220222147. The reversal of 220222121 is 121222022.

It is not a de Polignac number, because 220222121 - 2¹⁰ = 220221097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220222096 and 220222105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220222151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10256 + ... + 23358.

It is an arithmetic number, because the mean of its divisors is an integer number (21411936).

Almost surely, 2^220222121 is an apocalyptic number.

It is an amenable number.

220222121 is a deficient number, since it is larger than the sum of its proper divisors (36721111).

220222121 is an frugal number, since it uses more digits than its factorization.

220222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13138 (or 13110 counting only the distinct ones).

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

The square root of 220222121 is about 14839.8827825559. The cubic root of 220222121 is about 603.8841723789.

Adding to 220222121 its reverse (121222022), we get a palindrome (341444143).

Subtracting from 220222121 its reverse (121222022), we obtain a palindrome (99000099).

The spelling of 220222121 in words is "two hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".