2101311211 has 4 divisors (see below), whose sum is σ = 2192672592. Its totient is φ = 2009949832.

The previous prime is 2101311187. The next prime is 2101311217. The reversal of 2101311211 is 1121131012.

It is a happy number.

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 2101311211 - 2⁹ = 2101310699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101311191 and 2101311200.

It is not an unprimeable number, because it can be changed into a prime (2101311217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45680656 + ... + 45680701.

It is an arithmetic number, because the mean of its divisors is an integer number (548168148).

Almost surely, 2^2101311211 is an apocalyptic number.

2101311211 is a deficient number, since it is larger than the sum of its proper divisors (91361381).

2101311211 is an equidigital number, since it uses as much as digits as its factorization.

2101311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91361380.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2101311211 is about 45840.0612019661. The cubic root of 2101311211 is about 1280.8456348506.

Adding to 2101311211 its reverse (1121131012), we get a palindrome (3222442223).

The spelling of 2101311211 in words is "two billion, one hundred one million, three hundred eleven thousand, two hundred eleven".