2102011999 has 4 divisors (see below), whose sum is σ = 2109826440. Its totient is φ = 2094197560.

The previous prime is 2102011981. The next prime is 2102012027. The reversal of 2102011999 is 9991102012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102011999 - 2¹³ = 2102003807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102011979) 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 in 3 ways as a sum of consecutive naturals, for example, 3906817 + ... + 3907354.

It is an arithmetic number, because the mean of its divisors is an integer number (527456610).

Almost surely, 2^2102011999 is an apocalyptic number.

2102011999 is a deficient number, since it is larger than the sum of its proper divisors (7814441).

2102011999 is an equidigital number, since it uses as much as digits as its factorization.

2102011999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7814440.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 2102011999 is about 45847.7044027288. The cubic root of 2102011999 is about 1280.9880065090.

The spelling of 2102011999 in words is "two billion, one hundred two million, eleven thousand, nine hundred ninety-nine".