220211121 has 32 divisors (see below), whose sum is σ = 339978240. Its totient is φ = 125630784.

The previous prime is 220211119. The next prime is 220211129. The reversal of 220211121 is 121112022.

It is not a de Polignac number, because 220211121 - 2¹ = 220211119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220211097 and 220211106.

It is not an unprimeable number, because it can be changed into a prime (220211129) 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, 31666 + ... + 37988.

It is an arithmetic number, because the mean of its divisors is an integer number (10624320).

Almost surely, 2^220211121 is an apocalyptic number.

It is an amenable number.

220211121 is a deficient number, since it is larger than the sum of its proper divisors (119767119).

220211121 is a wasteful number, since it uses less digits than its factorization.

220211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 220211121 is about 14839.5121550542. The cubic root of 220211121 is about 603.8741176268.

Adding to 220211121 its reverse (121112022), we get a palindrome (341323143).

Subtracting from 220211121 its reverse (121112022), we obtain a palindrome (99099099).

It can be divided in two parts, 2202 and 11121, that multiplied together give a palindrome (24488442).

The spelling of 220211121 in words is "two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".