2221213220306 has 64 divisors (see below), whose sum is σ = 3522745144800. Its totient is φ = 1049188847616.

The previous prime is 2221213220263. The next prime is 2221213220357. The reversal of 2221213220306 is 6030223121222.

It can be written as a sum of positive squares in 16 ways, for example, as 35372205625 + 2185841014681 = 188075^2 + 1478459^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314215340 + ... + 314222408.

Almost surely, 2^{2221213220306} is an apocalyptic number.

2221213220306 is a deficient number, since it is larger than the sum of its proper divisors (1301531924494).

2221213220306 is a wasteful number, since it uses less digits than its factorization.

2221213220306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7983.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 2221213220306 its reverse (6030223121222), we get a palindrome (8251436341528).

The spelling of 2221213220306 in words is "two trillion, two hundred twenty-one billion, two hundred thirteen million, two hundred twenty thousand, three hundred six".