2011022591 has 2 divisors, whose sum is σ = 2011022592. Its totient is φ = 2011022590.

The previous prime is 2011022561. The next prime is 2011022593. The reversal of 2011022591 is 1952201102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011022591 - 2¹⁰ = 2011021567 is a prime.

Together with 2011022593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011022593) 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 as a sum of consecutive naturals, namely, 1005511295 + 1005511296.

It is an arithmetic number, because the mean of its divisors is an integer number (1005511296).

Almost surely, 2^2011022591 is an apocalyptic number.

2011022591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011022591 is an equidigital number, since it uses as much as digits as its factorization.

2011022591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 2011022591 is about 44844.4265321790. The cubic root of 2011022591 is about 1262.2314097910.

Adding to 2011022591 its reverse (1952201102), we get a palindrome (3963223693).

The spelling of 2011022591 in words is "two billion, eleven million, twenty-two thousand, five hundred ninety-one".