221300319791 has 2 divisors, whose sum is σ = 221300319792. Its totient is φ = 221300319790.

The previous prime is 221300319763. The next prime is 221300319811. The reversal of 221300319791 is 197913003122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221300319791 - 2³⁴ = 204120450607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221305319791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110650159895 + 110650159896.

It is an arithmetic number, because the mean of its divisors is an integer number (110650159896).

Almost surely, 2^221300319791 is an apocalyptic number.

221300319791 is a deficient number, since it is larger than the sum of its proper divisors (1).

221300319791 is an equidigital number, since it uses as much as digits as its factorization.

221300319791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 38.

The spelling of 221300319791 in words is "two hundred twenty-one billion, three hundred million, three hundred nineteen thousand, seven hundred ninety-one".