221943102247 has 2 divisors, whose sum is σ = 221943102248. Its totient is φ = 221943102246.

The previous prime is 221943102223. The next prime is 221943102263. The reversal of 221943102247 is 742201349122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221943102247 - 2²³ = 221934713639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221943802247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110971551123 + 110971551124.

It is an arithmetic number, because the mean of its divisors is an integer number (110971551124).

Almost surely, 2^221943102247 is an apocalyptic number.

221943102247 is a deficient number, since it is larger than the sum of its proper divisors (1).

221943102247 is an equidigital number, since it uses as much as digits as its factorization.

221943102247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 221943102247 in words is "two hundred twenty-one billion, nine hundred forty-three million, one hundred two thousand, two hundred forty-seven".