12111211222311 has 4 divisors (see below), whose sum is σ = 16148281629752. Its totient is φ = 8074140814872.

The previous prime is 12111211222303. The next prime is 12111211222393. The reversal of 12111211222311 is 11322211211121.

12111211222311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12111211222311 - 2³ = 12111211222303 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 (12111211222301) 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, 2018535203716 + ... + 2018535203721.

It is an arithmetic number, because the mean of its divisors is an integer number (4037070407438).

Almost surely, 2^{12111211222311} is an apocalyptic number.

12111211222311 is a deficient number, since it is larger than the sum of its proper divisors (4037070407441).

12111211222311 is an equidigital number, since it uses as much as digits as its factorization.

12111211222311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037070407440.

The product of its digits is 96, while the sum is 21.

Adding to 12111211222311 its reverse (11322211211121), we get a palindrome (23433422433432).

The spelling of 12111211222311 in words is "twelve trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty-two thousand, three hundred eleven".