221221305199 has 2 divisors, whose sum is σ = 221221305200. Its totient is φ = 221221305198.

The previous prime is 221221305197. The next prime is 221221305233. The reversal of 221221305199 is 991503122122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221221305199 - 2¹ = 221221305197 is a prime.

Together with 221221305197, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221221305197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610652599 + 110610652600.

It is an arithmetic number, because the mean of its divisors is an integer number (110610652600).

Almost surely, 2^221221305199 is an apocalyptic number.

221221305199 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221305199 is an equidigital number, since it uses as much as digits as its factorization.

221221305199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 221221305199 in words is "two hundred twenty-one billion, two hundred twenty-one million, three hundred five thousand, one hundred ninety-nine".