2011211091 has 24 divisors (see below), whose sum is σ = 2926699776. Its totient is φ = 1330863360.

The previous prime is 2011210997. The next prime is 2011211117. The reversal of 2011211091 is 1901121102.

It is a happy number.

It is not a de Polignac number, because 2011211091 - 2¹¹ = 2011209043 is a prime.

It is a super-2 number, since 2×2011211091² = 8089940105122820562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2011211591) 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 23 ways as a sum of consecutive naturals, for example, 1018381 + ... + 1020353.

It is an arithmetic number, because the mean of its divisors is an integer number (121945824).

Almost surely, 2^2011211091 is an apocalyptic number.

2011211091 is a deficient number, since it is larger than the sum of its proper divisors (915488685).

2011211091 is a wasteful number, since it uses less digits than its factorization.

2011211091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763 (or 2760 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 2011211091 is about 44846.5281933842. The cubic root of 2011211091 is about 1262.2708463092.

Adding to 2011211091 its reverse (1901121102), we get a palindrome (3912332193).

The spelling of 2011211091 in words is "two billion, eleven million, two hundred eleven thousand, ninety-one".