221988703009 has 2 divisors, whose sum is σ = 221988703010. Its totient is φ = 221988703008.

The previous prime is 221988703007. The next prime is 221988703093. The reversal of 221988703009 is 900307889122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210431377984 + 11557325025 = 458728^2 + 107505^2 .

It is a cyclic number.

It is not a de Polignac number, because 221988703009 - 2¹ = 221988703007 is a prime.

Together with 221988703007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221988703007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110994351504 + 110994351505.

It is an arithmetic number, because the mean of its divisors is an integer number (110994351505).

Almost surely, 2^221988703009 is an apocalyptic number.

It is an amenable number.

221988703009 is a deficient number, since it is larger than the sum of its proper divisors (1).

221988703009 is an equidigital number, since it uses as much as digits as its factorization.

221988703009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 221988703009 in words is "two hundred twenty-one billion, nine hundred eighty-eight million, seven hundred three thousand, nine".