2101099111 has 4 divisors (see below), whose sum is σ = 2101364424. Its totient is φ = 2100833800.

The previous prime is 2101099109. The next prime is 2101099127. The reversal of 2101099111 is 1119901012.

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 2101099111 - 2¹ = 2101099109 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 (2101099171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120400 + ... + 136741.

It is an arithmetic number, because the mean of its divisors is an integer number (525341106).

Almost surely, 2^2101099111 is an apocalyptic number.

2101099111 is a deficient number, since it is larger than the sum of its proper divisors (265313).

2101099111 is an equidigital number, since it uses as much as digits as its factorization.

2101099111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265312.

The product of its (nonzero) digits is 162, while the sum is 25.

The square root of 2101099111 is about 45837.7476649977. The cubic root of 2101099111 is about 1280.8025385054.

The spelling of 2101099111 in words is "two billion, one hundred one million, ninety-nine thousand, one hundred eleven".