111323220123 has 16 divisors (see below), whose sum is σ = 153009349920. Its totient is φ = 71941199616.

The previous prime is 111323220109. The next prime is 111323220137. The reversal of 111323220123 is 321022323111.

It is an interprime number because it is at equal distance from previous prime (111323220109) and next prime (111323220137).

It is not a de Polignac number, because 111323220123 - 2⁵ = 111323220091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111323220123.

It is not an unprimeable number, because it can be changed into a prime (111323220103) 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, 1834290 + ... + 1894007.

It is an arithmetic number, because the mean of its divisors is an integer number (9563084370).

Almost surely, 2^111323220123 is an apocalyptic number.

111323220123 is a deficient number, since it is larger than the sum of its proper divisors (41686129797).

111323220123 is a wasteful number, since it uses less digits than its factorization.

111323220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3728606.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 111323220123 its reverse (321022323111), we get a palindrome (432345543234).

The spelling of 111323220123 in words is "one hundred eleven billion, three hundred twenty-three million, two hundred twenty thousand, one hundred twenty-three".