222121222210 has 16 divisors (see below), whose sum is σ = 413605035000. Its totient is φ = 85784747776.

The previous prime is 222121222163. The next prime is 222121222231. The reversal of 222121222210 is 12222121222.

222121222210 is digitally balanced in base 2, because in such base 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 216438022441 + 5683199769 = 465229^2 + 75387^2 .

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 7 ways as a sum of consecutive naturals, for example, 382967335 + ... + 382967914.

Almost surely, 2^222121222210 is an apocalyptic number.

222121222210 is a deficient number, since it is larger than the sum of its proper divisors (191483812790).

222121222210 is a wasteful number, since it uses less digits than its factorization.

222121222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765935285.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222121222210 its reverse (12222121222), we get a palindrome (234343343432).

It can be divided in two parts, 2221212 and 22210, that added together give a palindrome (2243422).

The spelling of 222121222210 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred ten".