111121012111 has 8 divisors (see below), whose sum is σ = 111266318304. Its totient is φ = 110975752800.

The previous prime is 111121012063. The next prime is 111121012127. The reversal of 111121012111 is 111210121111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111121012111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121012091 and 111121012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121012511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8775861 + ... + 8788513.

It is an arithmetic number, because the mean of its divisors is an integer number (13908289788).

Almost surely, 2^111121012111 is an apocalyptic number.

111121012111 is a deficient number, since it is larger than the sum of its proper divisors (145306193).

111121012111 is an equidigital number, since it uses as much as digits as its factorization.

111121012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23441.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111121012111 its reverse (111210121111), we get a palindrome (222331133222).

The spelling of 111121012111 in words is "one hundred eleven billion, one hundred twenty-one million, twelve thousand, one hundred eleven".