111232121111 has 16 divisors (see below), whose sum is σ = 112310817696. Its totient is φ = 110160000000.

The previous prime is 111232121101. The next prime is 111232121123. The reversal of 111232121111 is 111121232111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111232121111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111232121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111232121101) 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 15 ways as a sum of consecutive naturals, for example, 61760411 + ... + 61762211.

It is an arithmetic number, because the mean of its divisors is an integer number (7019426106).

Almost surely, 2^111232121111 is an apocalyptic number.

111232121111 is a deficient number, since it is larger than the sum of its proper divisors (1078696585).

111232121111 is a wasteful number, since it uses less digits than its factorization.

111232121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314.

The product of its digits is 24, while the sum is 17.

Adding to 111232121111 its reverse (111121232111), we get a palindrome (222353353222).

The spelling of 111232121111 in words is "one hundred eleven billion, two hundred thirty-two million, one hundred twenty-one thousand, one hundred eleven".