111001211123 has 4 divisors (see below), whose sum is σ = 121092230328. Its totient is φ = 100910191920.

The previous prime is 111001211107. The next prime is 111001211129. The reversal of 111001211123 is 321112100111.

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 111001211123 - 2⁴ = 111001211107 is a prime.

It is a super-2 number, since 2×111001211123² (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 = 111001211098 and 111001211107.

It is not an unprimeable number, because it can be changed into a prime (111001211129) 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, 5045509586 + ... + 5045509607.

It is an arithmetic number, because the mean of its divisors is an integer number (30273057582).

Almost surely, 2^111001211123 is an apocalyptic number.

111001211123 is a deficient number, since it is larger than the sum of its proper divisors (10091019205).

111001211123 is a wasteful number, since it uses less digits than its factorization.

111001211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10091019204.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 111001211123 its reverse (321112100111), we get a palindrome (432113311234).

The spelling of 111001211123 in words is "one hundred eleven billion, one million, two hundred eleven thousand, one hundred twenty-three".