111220320123 has 24 divisors (see below), whose sum is σ = 175296576000. Its totient is φ = 67390749360.

The previous prime is 111220320097. The next prime is 111220320149. The reversal of 111220320123 is 321023022111.

111220320123 is a `hidden beast` number, since 1 + 1 + 1 + 220 + 320 + 123 = 666.

It is an interprime number because it is at equal distance from previous prime (111220320097) and next prime (111220320149).

It is not a de Polignac number, because 111220320123 - 2¹⁷ = 111220189051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111220320096 and 111220320105.

It is not an unprimeable number, because it can be changed into a prime (111220320023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310878 + ... + 564876.

It is an arithmetic number, because the mean of its divisors is an integer number (7304024000).

Almost surely, 2^111220320123 is an apocalyptic number.

111220320123 is a deficient number, since it is larger than the sum of its proper divisors (64076255877).

111220320123 is a wasteful number, since it uses less digits than its factorization.

111220320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258439 (or 258436 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 111220320123 its reverse (321023022111), we get a palindrome (432243342234).

The spelling of 111220320123 in words is "one hundred eleven billion, two hundred twenty million, three hundred twenty thousand, one hundred twenty-three".