220022222111221 has 4 divisors (see below), whose sum is σ = 227609195287500. Its totient is φ = 212435248934944.

The previous prime is 220022222111201. The next prime is 220022222111227. The reversal of 220022222111221 is 122111222220022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121744521764100 + 98277700347121 = 11033790^2 + 9913511^2 .

It is a cyclic number.

It is not a de Polignac number, because 220022222111221 - 2⁵ = 220022222111189 is a prime.

It is a super-2 number, since 2×220022222111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220022222111192 and 220022222111201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220022222111227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3793486588096 + ... + 3793486588153.

It is an arithmetic number, because the mean of its divisors is an integer number (56902298821875).

Almost surely, 2^{220022222111221} is an apocalyptic number.

It is an amenable number.

220022222111221 is a deficient number, since it is larger than the sum of its proper divisors (7586973176279).

220022222111221 is an equidigital number, since it uses as much as digits as its factorization.

220022222111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7586973176278.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 220022222111221 its reverse (122111222220022), we get a palindrome (342133444331243).

The spelling of 220022222111221 in words is "two hundred twenty trillion, twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, two hundred twenty-one".