111312212011123 has 4 divisors (see below), whose sum is σ = 111323475019288. Its totient is φ = 111300949002960.

The previous prime is 111312212011109. The next prime is 111312212011139. The reversal of 111312212011123 is 321110212213111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111312212011123 is a prime.

It is a super-2 number, since 2×111312212011123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111312212011094 and 111312212011103.

It is not an unprimeable number, because it can be changed into a prime (111312212011103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5631489258 + ... + 5631509023.

It is an arithmetic number, because the mean of its divisors is an integer number (27830868754822).

Almost surely, 2^{111312212011123} is an apocalyptic number.

111312212011123 is a deficient number, since it is larger than the sum of its proper divisors (11263008165).

111312212011123 is an equidigital number, since it uses as much as digits as its factorization.

111312212011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11263008164.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 111312212011123 its reverse (321110212213111), we get a palindrome (432422424224234).

The spelling of 111312212011123 in words is "one hundred eleven trillion, three hundred twelve billion, two hundred twelve million, eleven thousand, one hundred twenty-three".