2011001999 has 2 divisors, whose sum is σ = 2011002000. Its totient is φ = 2011001998.

The previous prime is 2011001981. The next prime is 2011002001. The reversal of 2011001999 is 9991001102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011001999 - 2¹² = 2010997903 is a prime.

Together with 2011002001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011001929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005500999 + 1005501000.

It is an arithmetic number, because the mean of its divisors is an integer number (1005501000).

Almost surely, 2^2011001999 is an apocalyptic number.

2011001999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011001999 is an equidigital number, since it uses as much as digits as its factorization.

2011001999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 2011001999 is about 44844.1969378425. The cubic root of 2011001999 is about 1262.2271015420.

The spelling of 2011001999 in words is "two billion, eleven million, one thousand, nine hundred ninety-nine".