2011132391 has 2 divisors, whose sum is σ = 2011132392. Its totient is φ = 2011132390.

The previous prime is 2011132379. The next prime is 2011132429. The reversal of 2011132391 is 1932311102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2011132391 - 2⁶ = 2011132327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011122391) 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, 1005566195 + 1005566196.

It is an arithmetic number, because the mean of its divisors is an integer number (1005566196).

Almost surely, 2^2011132391 is an apocalyptic number.

2011132391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011132391 is an equidigital number, since it uses as much as digits as its factorization.

2011132391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2011132391 is about 44845.6507478707. The cubic root of 2011132391 is about 1262.2543816010.

Adding to 2011132391 its reverse (1932311102), we get a palindrome (3943443493).

The spelling of 2011132391 in words is "two billion, eleven million, one hundred thirty-two thousand, three hundred ninety-one".