12012102311111 has 4 divisors (see below), whose sum is σ = 13728116926992. Its totient is φ = 10296087695232.

The previous prime is 12012102311101. The next prime is 12012102311189. The reversal of 12012102311111 is 11111320121021.

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-12012102311111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12012102311111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012102311101) 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, 858007307930 + ... + 858007307943.

It is an arithmetic number, because the mean of its divisors is an integer number (3432029231748).

Almost surely, 2^{12012102311111} is an apocalyptic number.

12012102311111 is a deficient number, since it is larger than the sum of its proper divisors (1716014615881).

12012102311111 is an equidigital number, since it uses as much as digits as its factorization.

12012102311111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716014615880.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 12012102311111 its reverse (11111320121021), we get a palindrome (23123422432132).

The spelling of 12012102311111 in words is "twelve trillion, twelve billion, one hundred two million, three hundred eleven thousand, one hundred eleven".