220113221 has 2 divisors, whose sum is σ = 220113222. Its totient is φ = 220113220.

The previous prime is 220113203. The next prime is 220113241. The reversal of 220113221 is 122311022.

It is a happy number.

220113221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144336196 + 75777025 = 12014^2 + 8705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220113221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220113196 and 220113205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220113241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110056610 + 110056611.

It is an arithmetic number, because the mean of its divisors is an integer number (110056611).

Almost surely, 2^220113221 is an apocalyptic number.

It is an amenable number.

220113221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220113221 is an equidigital number, since it uses as much as digits as its factorization.

220113221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 220113221 is about 14836.2131623942. The cubic root of 220113221 is about 603.7846155784.

Adding to 220113221 its reverse (122311022), we get a palindrome (342424243).

The spelling of 220113221 in words is "two hundred twenty million, one hundred thirteen thousand, two hundred twenty-one".