1012199999 has 2 divisors, whose sum is σ = 1012200000. Its totient is φ = 1012199998.

The previous prime is 1012199983. The next prime is 1012200017. The reversal of 1012199999 is 9999912101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012199999 - 2⁴ = 1012199983 is a prime.

It is a Sophie Germain prime.

1012199999 is a modest number, since divided by 99999 gives 10121 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012199959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506099999 + 506100000.

It is an arithmetic number, because the mean of its divisors is an integer number (506100000).

Almost surely, 2^1012199999 is an apocalyptic number.

1012199999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012199999 is an equidigital number, since it uses as much as digits as its factorization.

1012199999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 50.

The square root of 1012199999 is about 31815.0907432306. The cubic root of 1012199999 is about 1004.0502397440.

The spelling of 1012199999 in words is "one billion, twelve million, one hundred ninety-nine thousand, nine hundred ninety-nine".