2011011123 has 16 divisors (see below), whose sum is σ = 2962137600. Its totient is φ = 1203365280.

The previous prime is 2011011109. The next prime is 2011011133. The reversal of 2011011123 is 3211101102.

It is not a de Polignac number, because 2011011123 - 2⁹ = 2011010611 is a prime.

It is a super-2 number, since 2×2011011123² = 8088331473659442258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2011011099 and 2011011108.

It is not an unprimeable number, because it can be changed into a prime (2011011133) 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 15 ways as a sum of consecutive naturals, for example, 383088 + ... + 388301.

It is an arithmetic number, because the mean of its divisors is an integer number (185133600).

Almost surely, 2^2011011123 is an apocalyptic number.

2011011123 is a deficient number, since it is larger than the sum of its proper divisors (951126477).

2011011123 is a wasteful number, since it uses less digits than its factorization.

2011011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771482.

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

The square root of 2011011123 is about 44844.2986677236. The cubic root of 2011011123 is about 1262.2290104648.

Adding to 2011011123 its reverse (3211101102), we get a palindrome (5222112225).

The spelling of 2011011123 in words is "two billion, eleven million, eleven thousand, one hundred twenty-three".