111031201123 has 4 divisors (see below), whose sum is σ = 112130520048. Its totient is φ = 109931882200.

The previous prime is 111031201087. The next prime is 111031201217. The reversal of 111031201123 is 321102130111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111031201123 - 2⁹ = 111031200611 is a prime.

It is a super-2 number, since 2×111031201123² (a number of 23 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 = 111031201097 and 111031201106.

It is not an unprimeable number, because it can be changed into a prime (111031201423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549659311 + ... + 549659512.

It is an arithmetic number, because the mean of its divisors is an integer number (28032630012).

Almost surely, 2^111031201123 is an apocalyptic number.

111031201123 is a deficient number, since it is larger than the sum of its proper divisors (1099318925).

111031201123 is a wasteful number, since it uses less digits than its factorization.

111031201123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099318924.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111031201123 its reverse (321102130111), we get a palindrome (432133331234).

The spelling of 111031201123 in words is "one hundred eleven billion, thirty-one million, two hundred one thousand, one hundred twenty-three".