113221543123 has 4 divisors (see below), whose sum is σ = 121930892608. Its totient is φ = 104512193640.

The previous prime is 113221543111. The next prime is 113221543163. The reversal of 113221543123 is 321345122311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321345122311 = 23 ⋅13971527057.

It is a cyclic number.

It is not a de Polignac number, because 113221543123 - 2⁹ = 113221542611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113221543091 and 113221543100.

It is not an unprimeable number, because it can be changed into a prime (113221543163) 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, 4354674723 + ... + 4354674748.

It is an arithmetic number, because the mean of its divisors is an integer number (30482723152).

Almost surely, 2^113221543123 is an apocalyptic number.

113221543123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

113221543123 is a deficient number, since it is larger than the sum of its proper divisors (8709349485).

113221543123 is an equidigital number, since it uses as much as digits as its factorization.

113221543123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8709349484.

The product of its digits is 4320, while the sum is 28.

Adding to 113221543123 its reverse (321345122311), we get a palindrome (434566665434).

The spelling of 113221543123 in words is "one hundred thirteen billion, two hundred twenty-one million, five hundred forty-three thousand, one hundred twenty-three".