12111120211211 has 4 divisors (see below), whose sum is σ = 13841280241392. Its totient is φ = 10380960181032.

The previous prime is 12111120211193. The next prime is 12111120211237. The reversal of 12111120211211 is 11211202111121.

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

It is a de Polignac number, because none of the positive numbers 2^k-12111120211211 is a prime.

It is a super-3 number, since 3×12111120211211³ (a number of 40 digits) contains 333 as substring.

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 12111120211211.

It is not an unprimeable number, because it can be changed into a prime (12111120211511) 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, 865080015080 + ... + 865080015093.

It is an arithmetic number, because the mean of its divisors is an integer number (3460320060348).

Almost surely, 2^{12111120211211} is an apocalyptic number.

12111120211211 is a deficient number, since it is larger than the sum of its proper divisors (1730160030181).

12111120211211 is an equidigital number, since it uses as much as digits as its factorization.

12111120211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730160030180.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12111120211211 its reverse (11211202111121), we get a palindrome (23322322322332).

The spelling of 12111120211211 in words is "twelve trillion, one hundred eleven billion, one hundred twenty million, two hundred eleven thousand, two hundred eleven".