222010221221 has 4 divisors (see below), whose sum is σ = 222011274912. Its totient is φ = 222009167532.

The previous prime is 222010221193. The next prime is 222010221227. The reversal of 222010221221 is 122122010222.

It is a happy number.

222010221221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 222010221221 - 2²² = 222006026917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222010221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222010221227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90131 + ... + 672416.

It is an arithmetic number, because the mean of its divisors is an integer number (55502818728).

Almost surely, 2^222010221221 is an apocalyptic number.

It is an amenable number.

222010221221 is a deficient number, since it is larger than the sum of its proper divisors (1053691).

222010221221 is an equidigital number, since it uses as much as digits as its factorization.

222010221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053690.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222010221221 its reverse (122122010222), we get a palindrome (344132231443).

The spelling of 222010221221 in words is "two hundred twenty-two billion, ten million, two hundred twenty-one thousand, two hundred twenty-one".