2012540123 has 12 divisors (see below), whose sum is σ = 2215605504. Its totient is φ = 1826708400.

The previous prime is 2012540111. The next prime is 2012540147. The reversal of 2012540123 is 3210452102.

It is not a de Polignac number, because 2012540123 - 2⁴ = 2012540107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012540095 and 2012540104.

It is not an unprimeable number, because it can be changed into a prime (2012540183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66278 + ... + 91748.

It is an arithmetic number, because the mean of its divisors is an integer number (184633792).

Almost surely, 2^2012540123 is an apocalyptic number.

2012540123 is a deficient number, since it is larger than the sum of its proper divisors (203065381).

2012540123 is a wasteful number, since it uses less digits than its factorization.

2012540123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26146 (or 26135 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2012540123 is about 44861.3433035615. The cubic root of 2012540123 is about 1262.5488262396.

Adding to 2012540123 its reverse (3210452102), we get a palindrome (5222992225).

The spelling of 2012540123 in words is "two billion, twelve million, five hundred forty thousand, one hundred twenty-three".