111012312012123 has 16 divisors (see below), whose sum is σ = 148076122985856. Its totient is φ = 73978359161280.

The previous prime is 111012312012079. The next prime is 111012312012187. The reversal of 111012312012123 is 321210213210111.

It is not a de Polignac number, because 111012312012123 - 2⁶ = 111012312012059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111012312012123.

It is not an unprimeable number, because it can be changed into a prime (111012312011123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96252103 + ... + 97398623.

It is an arithmetic number, because the mean of its divisors is an integer number (9254757686616).

Almost surely, 2^{111012312012123} is an apocalyptic number.

111012312012123 is a deficient number, since it is larger than the sum of its proper divisors (37063810973733).

111012312012123 is a wasteful number, since it uses less digits than its factorization.

111012312012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159514.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 111012312012123 its reverse (321210213210111), we get a palindrome (432222525222234).

The spelling of 111012312012123 in words is "one hundred eleven trillion, twelve billion, three hundred twelve million, twelve thousand, one hundred twenty-three".