220611121 has 4 divisors (see below), whose sum is σ = 221330032. Its totient is φ = 219892212.

The previous prime is 220611107. The next prime is 220611137. The reversal of 220611121 is 121116022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220611121 - 2⁹ = 220610609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220611095 and 220611104.

It is not an unprimeable number, because it can be changed into a prime (220611191) 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 3 ways as a sum of consecutive naturals, for example, 358995 + ... + 359608.

It is an arithmetic number, because the mean of its divisors is an integer number (55332508).

Almost surely, 2^220611121 is an apocalyptic number.

It is an amenable number.

220611121 is a deficient number, since it is larger than the sum of its proper divisors (718911).

220611121 is an equidigital number, since it uses as much as digits as its factorization.

220611121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718910.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 220611121 is about 14852.9835723332. The cubic root of 220611121 is about 604.2395299032.

Adding to 220611121 its reverse (121116022), we get a palindrome (341727143).

The spelling of 220611121 in words is "two hundred twenty million, six hundred eleven thousand, one hundred twenty-one".