2221198999 has 2 divisors, whose sum is σ = 2221199000. Its totient is φ = 2221198998.

The previous prime is 2221198981. The next prime is 2221199021. The reversal of 2221198999 is 9998911222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221198999 - 2¹¹ = 2221196951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221198909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110599499 + 1110599500.

It is an arithmetic number, because the mean of its divisors is an integer number (1110599500).

Almost surely, 2^2221198999 is an apocalyptic number.

2221198999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221198999 is an equidigital number, since it uses as much as digits as its factorization.

2221198999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 52.

The square root of 2221198999 is about 47129.5979083208. The cubic root of 2221198999 is about 1304.7555604666.

The spelling of 2221198999 in words is "two billion, two hundred twenty-one million, one hundred ninety-eight thousand, nine hundred ninety-nine".