131223111223 has 16 divisors (see below), whose sum is σ = 135518255136. Its totient is φ = 126985420800.

The previous prime is 131223111221. The next prime is 131223111269. The reversal of 131223111223 is 322111322131.

It is a cyclic number.

It is not a de Polignac number, because 131223111223 - 2¹ = 131223111221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131223111194 and 131223111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223111221) 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 15 ways as a sum of consecutive naturals, for example, 17979511 + ... + 17986807.

It is an arithmetic number, because the mean of its divisors is an integer number (8469890946).

Almost surely, 2^131223111223 is an apocalyptic number.

131223111223 is a deficient number, since it is larger than the sum of its proper divisors (4295143913).

131223111223 is a wasteful number, since it uses less digits than its factorization.

131223111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11154.

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

Adding to 131223111223 its reverse (322111322131), we get a palindrome (453334433354).

The spelling of 131223111223 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred eleven thousand, two hundred twenty-three".