221544445099 has 2 divisors, whose sum is σ = 221544445100. Its totient is φ = 221544445098.

The previous prime is 221544445051. The next prime is 221544445123. The reversal of 221544445099 is 990544445122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221544445099 - 2⁹ = 221544444587 is a prime.

It is not a weakly prime, because it can be changed into another prime (221544445399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110772222549 + 110772222550.

It is an arithmetic number, because the mean of its divisors is an integer number (110772222550).

Almost surely, 2^221544445099 is an apocalyptic number.

221544445099 is a deficient number, since it is larger than the sum of its proper divisors (1).

221544445099 is an equidigital number, since it uses as much as digits as its factorization.

221544445099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 221544445099 in words is "two hundred twenty-one billion, five hundred forty-four million, four hundred forty-five thousand, ninety-nine".