9999220241 has 2 divisors, whose sum is σ = 9999220242. Its totient is φ = 9999220240.

The previous prime is 9999220237. The next prime is 9999220243. The reversal of 9999220241 is 1420229999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5221507600 + 4777712641 = 72260^2 + 69121^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999220241 - 2² = 9999220237 is a prime.

Together with 9999220243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9999220243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999610120 + 4999610121.

It is an arithmetic number, because the mean of its divisors is an integer number (4999610121).

Almost surely, 2^9999220241 is an apocalyptic number.

It is an amenable number.

9999220241 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999220241 is an equidigital number, since it uses as much as digits as its factorization.

9999220241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 9999220241 is about 99996.1011289940. The cubic root of 9999220241 is about 2154.3786905817.

The spelling of 9999220241 in words is "nine billion, nine hundred ninety-nine million, two hundred twenty thousand, two hundred forty-one".