111121301123 has 4 divisors (see below), whose sum is σ = 126995772720. Its totient is φ = 95246829528.

The previous prime is 111121301113. The next prime is 111121301149. The reversal of 111121301123 is 321103121111.

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 111121301123 - 2¹⁰ = 111121300099 is a prime.

It is a super-2 number, since 2×111121301123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111121301113) 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, 7937235788 + ... + 7937235801.

It is an arithmetic number, because the mean of its divisors is an integer number (31748943180).

Almost surely, 2^111121301123 is an apocalyptic number.

111121301123 is a deficient number, since it is larger than the sum of its proper divisors (15874471597).

111121301123 is an equidigital number, since it uses as much as digits as its factorization.

111121301123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15874471596.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111121301123 its reverse (321103121111), we get a palindrome (432224422234).

The spelling of 111121301123 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred one thousand, one hundred twenty-three".