12111111101223 has 6 divisors (see below), whose sum is σ = 17493827146224. Its totient is φ = 8074074067476.

The previous prime is 12111111101203. The next prime is 12111111101231. The reversal of 12111111101223 is 32210111111121.

It is not a de Polignac number, because 12111111101223 - 2¹⁷ = 12111110970151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111111101196 and 12111111101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111111101203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672839505615 + ... + 672839505632.

It is an arithmetic number, because the mean of its divisors is an integer number (2915637857704).

Almost surely, 2^{12111111101223} is an apocalyptic number.

12111111101223 is a deficient number, since it is larger than the sum of its proper divisors (5382716045001).

12111111101223 is a wasteful number, since it uses less digits than its factorization.

12111111101223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345679011253 (or 1345679011250 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 12111111101223 its reverse (32210111111121), we get a palindrome (44321222212344).

The spelling of 12111111101223 in words is "twelve trillion, one hundred eleven billion, one hundred eleven million, one hundred one thousand, two hundred twenty-three".