1223443112311 has 16 divisors (see below), whose sum is σ = 1406071554048. Its totient is φ = 1042781529600.

The previous prime is 1223443112303. The next prime is 1223443112321. The reversal of 1223443112311 is 1132113443221.

It is a cyclic number.

It is not a de Polignac number, because 1223443112311 - 2³ = 1223443112303 is a prime.

It is a super-2 number, since 2×1223443112311² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223443112311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223443112321) 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, 3399831 + ... + 3742423.

It is an arithmetic number, because the mean of its divisors is an integer number (87879472128).

Almost surely, 2^{1223443112311} is an apocalyptic number.

1223443112311 is a deficient number, since it is larger than the sum of its proper divisors (182628441737).

1223443112311 is a wasteful number, since it uses less digits than its factorization.

1223443112311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345462.

The product of its digits is 3456, while the sum is 28.

Adding to 1223443112311 its reverse (1132113443221), we get a palindrome (2355556555532).

The spelling of 1223443112311 in words is "one trillion, two hundred twenty-three billion, four hundred forty-three million, one hundred twelve thousand, three hundred eleven".