10219999 has 2 divisors, whose sum is σ = 10220000. Its totient is φ = 10219998.

The previous prime is 10219997. The next prime is 10220003. The reversal of 10219999 is 99991201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10219999 - 2¹ = 10219997 is a prime.

Together with 10219997, it forms a pair of twin primes.

10219999 is a modest number, since divided by 9999 gives 1021 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10219991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5109999 + 5110000.

It is an arithmetic number, because the mean of its divisors is an integer number (5110000).

Almost surely, 2^10219999 is an apocalyptic number.

10219999 is a deficient number, since it is larger than the sum of its proper divisors (1).

10219999 is an equidigital number, since it uses as much as digits as its factorization.

10219999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 10219999 is about 3196.8733162263. The cubic root of 10219999 is about 217.0119341904.

The spelling of 10219999 in words is "ten million, two hundred nineteen thousand, nine hundred ninety-nine".