221220112210 has 32 divisors (see below), whose sum is σ = 398662083072. Its totient is φ = 88384588800.

The previous prime is 221220112207. The next prime is 221220112229. The reversal of 221220112210 is 12211022122.

It is a happy number.

221220112210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 50701489 + ... + 50705851.

It is an arithmetic number, because the mean of its divisors is an integer number (12458190096).

Almost surely, 2^221220112210 is an apocalyptic number.

221220112210 is a deficient number, since it is larger than the sum of its proper divisors (177441970862).

221220112210 is a wasteful number, since it uses less digits than its factorization.

221220112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221220112210 its reverse (12211022122), we get a palindrome (233431134332).

The spelling of 221220112210 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, two hundred ten".