2100011011 has 4 divisors (see below), whose sum is σ = 2400012592. Its totient is φ = 1800009432.

The previous prime is 2100011009. The next prime is 2100011041. The reversal of 2100011011 is 1101100012.

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 2100011011 - 2¹ = 2100011009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 300001573 = 2100011011 / (2 + 1 + 0 + 0 + 0 + 1 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100010985 and 2100011003.

It is not an unprimeable number, because it can be changed into a prime (2100011041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150000780 + ... + 150000793.

It is an arithmetic number, because the mean of its divisors is an integer number (600003148).

Almost surely, 2^2100011011 is an apocalyptic number.

2100011011 is a deficient number, since it is larger than the sum of its proper divisors (300001581).

2100011011 is an equidigital number, since it uses as much as digits as its factorization.

2100011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300001580.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 2100011011 is about 45825.8770892604. The cubic root of 2100011011 is about 1280.5814031514.

Adding to 2100011011 its reverse (1101100012), we get a palindrome (3201111023).

The spelling of 2100011011 in words is "two billion, one hundred million, eleven thousand, eleven".