12012120311 has 4 divisors (see below), whose sum is σ = 12019541400. Its totient is φ = 12004699224.

The previous prime is 12012120229. The next prime is 12012120319. The reversal of 12012120311 is 11302121021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11302121021 = 7417 ⋅1523813.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012120311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012120319) 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, 3708116 + ... + 3711353.

It is an arithmetic number, because the mean of its divisors is an integer number (3004885350).

Almost surely, 2^12012120311 is an apocalyptic number.

12012120311 is a deficient number, since it is larger than the sum of its proper divisors (7421089).

12012120311 is an equidigital number, since it uses as much as digits as its factorization.

12012120311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7421088.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12012120311 its reverse (11302121021), we get a palindrome (23314241332).

The spelling of 12012120311 in words is "twelve billion, twelve million, one hundred twenty thousand, three hundred eleven".