2221306601 has 2 divisors, whose sum is σ = 2221306602. Its totient is φ = 2221306600.

The previous prime is 2221306583. The next prime is 2221306603. The reversal of 2221306601 is 1066031222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1287087376 + 934219225 = 35876^2 + 30565^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221306601 - 2⁶ = 2221306537 is a prime.

Together with 2221306603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2221306603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110653300 + 1110653301.

It is an arithmetic number, because the mean of its divisors is an integer number (1110653301).

Almost surely, 2^2221306601 is an apocalyptic number.

It is an amenable number.

2221306601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221306601 is an equidigital number, since it uses as much as digits as its factorization.

2221306601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2221306601 is about 47130.7394488990. The cubic root of 2221306601 is about 1304.7766289737.

Adding to 2221306601 its reverse (1066031222), we get a palindrome (3287337823).

The spelling of 2221306601 in words is "two billion, two hundred twenty-one million, three hundred six thousand, six hundred one".