2223220221 has 24 divisors (see below), whose sum is σ = 3308671704. Its totient is φ = 1437471360.

The previous prime is 2223220189. The next prime is 2223220261. The reversal of 2223220221 is 1220223222.

2223220221 is a `hidden beast` number, since 2 + 223 + 220 + 221 = 666.

2223220221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 918999225 + 1304220996 = 30315^2 + 36114^2 .

It is not a de Polignac number, because 2223220221 - 2⁵ = 2223220189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2223220194 and 2223220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223220261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95031 + ... + 116091.

It is an arithmetic number, because the mean of its divisors is an integer number (137861321).

Almost surely, 2^2223220221 is an apocalyptic number.

It is an amenable number.

2223220221 is a deficient number, since it is larger than the sum of its proper divisors (1085451483).

2223220221 is a wasteful number, since it uses less digits than its factorization.

2223220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21421 (or 21418 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2223220221 is about 47151.0362664491. The cubic root of 2223220221 is about 1305.1512028089.

Adding to 2223220221 its reverse (1220223222), we get a palindrome (3443443443).

The spelling of 2223220221 in words is "two billion, two hundred twenty-three million, two hundred twenty thousand, two hundred twenty-one".