2221302220306 has 24 divisors (see below), whose sum is σ = 3787052874444. Its totient is φ = 971257646880.

The previous prime is 2221302220303. The next prime is 2221302220441. The reversal of 2221302220306 is 6030222031222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1940195482281 + 281106738025 = 1392909^2 + 530195^2 .

It is not an unprimeable number, because it can be changed into a prime (2221302220303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118321225 + ... + 118339996.

Almost surely, 2^{2221302220306} is an apocalyptic number.

2221302220306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2221302220306 is a deficient number, since it is larger than the sum of its proper divisors (1565750654138).

2221302220306 is a wasteful number, since it uses less digits than its factorization.

2221302220306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236661274 (or 236661255 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 2221302220306 its reverse (6030222031222), we get a palindrome (8251524251528).

The spelling of 2221302220306 in words is "two trillion, two hundred twenty-one billion, three hundred two million, two hundred twenty thousand, three hundred six".