2221231009 has 2 divisors, whose sum is σ = 2221231010. Its totient is φ = 2221231008.

The previous prime is 2221230983. The next prime is 2221231013. The reversal of 2221231009 is 9001321222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2199328609 + 21902400 = 46897^2 + 4680^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221231009 - 2¹⁵ = 2221198241 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221231069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110615504 + 1110615505.

It is an arithmetic number, because the mean of its divisors is an integer number (1110615505).

Almost surely, 2^2221231009 is an apocalyptic number.

It is an amenable number.

2221231009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221231009 is an equidigital number, since it uses as much as digits as its factorization.

2221231009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2221231009 is about 47129.9375026108. The cubic root of 2221231009 is about 1304.7618281062.

The spelling of 2221231009 in words is "two billion, two hundred twenty-one million, two hundred thirty-one thousand, nine".