221200799 has 2 divisors, whose sum is σ = 221200800. Its totient is φ = 221200798.

The previous prime is 221200739. The next prime is 221200801. The reversal of 221200799 is 997002122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221200799 is a prime.

Together with 221200801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221200739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600399 + 110600400.

It is an arithmetic number, because the mean of its divisors is an integer number (110600400).

Almost surely, 2^221200799 is an apocalyptic number.

221200799 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200799 is an equidigital number, since it uses as much as digits as its factorization.

221200799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 221200799 is about 14872.8208151648. The cubic root of 221200799 is about 604.7774141911. Note that the first 3 decimals are identical.

The spelling of 221200799 in words is "two hundred twenty-one million, two hundred thousand, seven hundred ninety-nine".