221333199937 has 2 divisors, whose sum is σ = 221333199938. Its totient is φ = 221333199936.

The previous prime is 221333199859. The next prime is 221333199947. The reversal of 221333199937 is 739991333122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148840868401 + 72492331536 = 385799^2 + 269244^2 .

It is a cyclic number.

It is not a de Polignac number, because 221333199937 - 2¹¹ = 221333197889 is a prime.

It is not a weakly prime, because it can be changed into another prime (221333199947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110666599968 + 110666599969.

It is an arithmetic number, because the mean of its divisors is an integer number (110666599969).

Almost surely, 2^221333199937 is an apocalyptic number.

It is an amenable number.

221333199937 is a deficient number, since it is larger than the sum of its proper divisors (1).

221333199937 is an equidigital number, since it uses as much as digits as its factorization.

221333199937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 52.

The spelling of 221333199937 in words is "two hundred twenty-one billion, three hundred thirty-three million, one hundred ninety-nine thousand, nine hundred thirty-seven".