111121121121 has 8 divisors (see below), whose sum is σ = 155959468320. Its totient is φ = 70181760672.

The previous prime is 111121121119. The next prime is 111121121149. The reversal of 111121121121 is 121121121111.

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

It is not a de Polignac number, because 111121121121 - 2¹ = 111121121119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111121121121.

It is not an unprimeable number, because it can be changed into a prime (111121121161) 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, 974746620 + ... + 974746733.

It is an arithmetic number, because the mean of its divisors is an integer number (19494933540).

Almost surely, 2^111121121121 is an apocalyptic number.

It is an amenable number.

111121121121 is a deficient number, since it is larger than the sum of its proper divisors (44838347199).

111121121121 is a wasteful number, since it uses less digits than its factorization.

111121121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949493375.

The product of its digits is 8, while the sum is 15.

Adding to 111121121121 its reverse (121121121111), we get a palindrome (232242242232).

It can be divided in two parts, 111 and 121121121, that multiplied together give a palindrome (13444444431).

The spelling of 111121121121 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".