111002011123 has 4 divisors (see below), whose sum is σ = 111042510768. Its totient is φ = 110961511480.

The previous prime is 111002011091. The next prime is 111002011163. The reversal of 111002011123 is 321110200111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321110200111 = 12653 ⋅25378187.

It is a cyclic number.

It is not a de Polignac number, because 111002011123 - 2⁵ = 111002011091 is a prime.

It is a super-2 number, since 2×111002011123² (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 (111002011163) 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, 20245711 + ... + 20251192.

It is an arithmetic number, because the mean of its divisors is an integer number (27760627692).

Almost surely, 2^111002011123 is an apocalyptic number.

111002011123 is a deficient number, since it is larger than the sum of its proper divisors (40499645).

111002011123 is an equidigital number, since it uses as much as digits as its factorization.

111002011123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40499644.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 111002011123 its reverse (321110200111), we get a palindrome (432112211234).

The spelling of 111002011123 in words is "one hundred eleven billion, two million, eleven thousand, one hundred twenty-three".