2011011023 has 4 divisors (see below), whose sum is σ = 2298298320. Its totient is φ = 1723723728.

The previous prime is 2011011011. The next prime is 2011011077. The reversal of 2011011023 is 3201101102.

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 2011011023 - 2⁴ = 2011011007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011010995 and 2011011013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011013023) 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, 143643638 + ... + 143643651.

It is an arithmetic number, because the mean of its divisors is an integer number (574574580).

Almost surely, 2^2011011023 is an apocalyptic number.

2011011023 is a deficient number, since it is larger than the sum of its proper divisors (287287297).

2011011023 is an equidigital number, since it uses as much as digits as its factorization.

2011011023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287287296.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2011011023 is about 44844.2975527547. The cubic root of 2011011023 is about 1262.2289895429.

Adding to 2011011023 its reverse (3201101102), we get a palindrome (5212112125).

It can be divided in two parts, 201101102 and 3, that multiplied together give a palindrome (603303306).

The spelling of 2011011023 in words is "two billion, eleven million, eleven thousand, twenty-three".