1123220321311 has 4 divisors (see below), whose sum is σ = 1225331259624. Its totient is φ = 1021109383000.

The previous prime is 1123220321299. The next prime is 1123220321317. The reversal of 1123220321311 is 1131230223211.

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

It is a cyclic number.

It is not a de Polignac number, because 1123220321311 - 2⁹ = 1123220320799 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 (1123220321317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51055469140 + ... + 51055469161.

It is an arithmetic number, because the mean of its divisors is an integer number (306332814906).

Almost surely, 2^{1123220321311} is an apocalyptic number.

1123220321311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123220321311 is a deficient number, since it is larger than the sum of its proper divisors (102110938313).

1123220321311 is a wasteful number, since it uses less digits than its factorization.

1123220321311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102110938312.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1123220321311 its reverse (1131230223211), we get a palindrome (2254450544522).

The spelling of 1123220321311 in words is "one trillion, one hundred twenty-three billion, two hundred twenty million, three hundred twenty-one thousand, three hundred eleven".