2011311123 has 16 divisors (see below), whose sum is σ = 2881883520. Its totient is φ = 1243161216.

The previous prime is 2011311119. The next prime is 2011311131. The reversal of 2011311123 is 3211131102.

It is a happy number.

It is not a de Polignac number, because 2011311123 - 2² = 2011311119 is a prime.

It is a super-2 number, since 2×2011311123² = 8090744867007042258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2011311163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290893 + ... + 297726.

It is an arithmetic number, because the mean of its divisors is an integer number (180117720).

Almost surely, 2^2011311123 is an apocalyptic number.

2011311123 is a deficient number, since it is larger than the sum of its proper divisors (870572397).

2011311123 is a wasteful number, since it uses less digits than its factorization.

2011311123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588706.

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

The square root of 2011311123 is about 44847.6434497957. The cubic root of 2011311123 is about 1262.2917732330.

Adding to 2011311123 its reverse (3211131102), we get a palindrome (5222442225).

The spelling of 2011311123 in words is "two billion, eleven million, three hundred eleven thousand, one hundred twenty-three".