2011130123 has 4 divisors (see below), whose sum is σ = 2011426080. Its totient is φ = 2010834168.

The previous prime is 2011130111. The next prime is 2011130131. The reversal of 2011130123 is 3210311102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3210311102 = 2 ⋅1605155551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011130123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011130098 and 2011130107.

It is not an unprimeable number, because it can be changed into a prime (2011130323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137540 + ... + 151457.

It is an arithmetic number, because the mean of its divisors is an integer number (502856520).

Almost surely, 2^2011130123 is an apocalyptic number.

2011130123 is a deficient number, since it is larger than the sum of its proper divisors (295957).

2011130123 is an equidigital number, since it uses as much as digits as its factorization.

2011130123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295956.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2011130123 is about 44845.6254611305. The cubic root of 2011130123 is about 1262.2539071097.

Adding to 2011130123 its reverse (3210311102), we get a palindrome (5221441225).

The spelling of 2011130123 in words is "two billion, eleven million, one hundred thirty thousand, one hundred twenty-three".