222010221 has 16 divisors (see below), whose sum is σ = 300212928. Its totient is φ = 145920000.

The previous prime is 222010213. The next prime is 222010223. The reversal of 222010221 is 122010222.

It is not a de Polignac number, because 222010221 - 2³ = 222010213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222010197 and 222010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222010223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76446 + ... + 79296.

It is an arithmetic number, because the mean of its divisors is an integer number (18763308).

Almost surely, 2^222010221 is an apocalyptic number.

It is an amenable number.

222010221 is a deficient number, since it is larger than the sum of its proper divisors (78202707).

222010221 is a wasteful number, since it uses less digits than its factorization.

222010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 222010221 is about 14900.0074161055. The cubic root of 222010221 is about 605.5141870994.

Adding to 222010221 its reverse (122010222), we get a palindrome (344020443).

Subtracting from 222010221 its reverse (122010222), we obtain a palindrome (99999999).

The spelling of 222010221 in words is "two hundred twenty-two million, ten thousand, two hundred twenty-one".