1223311211311 has 16 divisors (see below), whose sum is σ = 1427863071744. Its totient is φ = 1026209097504.

The previous prime is 1223311211279. The next prime is 1223311211431. The reversal of 1223311211311 is 1131121133221.

It is a cyclic number.

It is not a de Polignac number, because 1223311211311 - 2⁵ = 1223311211279 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 (1223311211611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18668641 + ... + 18734053.

It is an arithmetic number, because the mean of its divisors is an integer number (89241441984).

Almost surely, 2^{1223311211311} is an apocalyptic number.

1223311211311 is a deficient number, since it is larger than the sum of its proper divisors (204551860433).

1223311211311 is an equidigital number, since it uses as much as digits as its factorization.

1223311211311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122310.

The product of its digits is 216, while the sum is 22.

Adding to 1223311211311 its reverse (1131121133221), we get a palindrome (2354432344532).

The spelling of 1223311211311 in words is "one trillion, two hundred twenty-three billion, three hundred eleven million, two hundred eleven thousand, three hundred eleven".