2011231311 has 8 divisors (see below), whose sum is σ = 2754118704. Its totient is φ = 1304582400.

The previous prime is 2011231307. The next prime is 2011231331. The reversal of 2011231311 is 1131321102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2011231311 - 2² = 2011231307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011231331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9059490 + ... + 9059711.

It is an arithmetic number, because the mean of its divisors is an integer number (344264838).

Almost surely, 2^2011231311 is an apocalyptic number.

2011231311 is a deficient number, since it is larger than the sum of its proper divisors (742887393).

2011231311 is a wasteful number, since it uses less digits than its factorization.

2011231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18119241.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2011231311 is about 44846.7536283286. The cubic root of 2011231311 is about 1262.2750764355.

Adding to 2011231311 its reverse (1131321102), we get a palindrome (3142552413).

The spelling of 2011231311 in words is "two billion, eleven million, two hundred thirty-one thousand, three hundred eleven".