12111223123311 has 16 divisors (see below), whose sum is σ = 17951457269760. Its totient is φ = 7212639080160.

The previous prime is 12111223123283. The next prime is 12111223123313. The reversal of 12111223123311 is 11332132211121.

It is not a de Polignac number, because 12111223123311 - 2¹³ = 12111223115119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111223123313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5008775931 + ... + 5008778348.

It is an arithmetic number, because the mean of its divisors is an integer number (1121966079360).

Almost surely, 2^{12111223123311} is an apocalyptic number.

12111223123311 is a deficient number, since it is larger than the sum of its proper divisors (5840234146449).

12111223123311 is a wasteful number, since it uses less digits than its factorization.

12111223123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10017554326.

The product of its digits is 432, while the sum is 24.

Adding to 12111223123311 its reverse (11332132211121), we get a palindrome (23443355334432).

The spelling of 12111223123311 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-three million, one hundred twenty-three thousand, three hundred eleven".