111111021110121 has 8 divisors (see below), whose sum is σ = 148239421137984. Its totient is φ = 74028317577840.

The previous prime is 111111021110099. The next prime is 111111021110191. The reversal of 111111021110121 is 121011120111111.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-111111021110121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111111021110121.

It is not an unprimeable number, because it can be changed into a prime (111111021110191) 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, 11424118221 + ... + 11424127946.

It is an arithmetic number, because the mean of its divisors is an integer number (18529927642248).

Almost surely, 2^{111111021110121} is an apocalyptic number.

It is an amenable number.

111111021110121 is a deficient number, since it is larger than the sum of its proper divisors (37128400027863).

111111021110121 is a wasteful number, since it uses less digits than its factorization.

111111021110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22848247791.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 111111021110121 its reverse (121011120111111), we get a palindrome (232122141221232).

The spelling of 111111021110121 in words is "one hundred eleven trillion, one hundred eleven billion, twenty-one million, one hundred ten thousand, one hundred twenty-one".