2011123 has 2 divisors, whose sum is σ = 2011124. Its totient is φ = 2011122.

The previous prime is 2011111. The next prime is 2011127. The reversal of 2011123 is 3211102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011123 - 2⁹ = 2010611 is a prime.

It is a super-2 number, since 2×2011123² = 8089231442258, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2011127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005561 + 1005562.

It is an arithmetic number, because the mean of its divisors is an integer number (1005562).

2^2011123 is an apocalyptic number.

2011123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011123 is an equidigital number, since it uses as much as digits as its factorization.

2011123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2011123 is about 1418.1406841354. The cubic root of 2011123 is about 126.2252416895.

Adding to 2011123 its reverse (3211102), we get a palindrome (5222225).

The spelling of 2011123 in words is "two million, eleven thousand, one hundred twenty-three".