12012301123 has 4 divisors (see below), whose sum is σ = 12238948368. Its totient is φ = 11785653880.

The previous prime is 12012301061. The next prime is 12012301127. The reversal of 12012301123 is 32110321021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012301123 is a prime.

It is a super-2 number, since 2×12012301123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012301097 and 12012301106.

It is not an unprimeable number, because it can be changed into a prime (12012301127) 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, 113323543 + ... + 113323648.

It is an arithmetic number, because the mean of its divisors is an integer number (3059737092).

Almost surely, 2^12012301123 is an apocalyptic number.

12012301123 is a deficient number, since it is larger than the sum of its proper divisors (226647245).

12012301123 is an equidigital number, since it uses as much as digits as its factorization.

12012301123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226647244.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12012301123 its reverse (32110321021), we get a palindrome (44122622144).

The spelling of 12012301123 in words is "twelve billion, twelve million, three hundred one thousand, one hundred twenty-three".