111011122012121 has 8 divisors (see below), whose sum is σ = 117541634522400. Its totient is φ = 104480659114048.

The previous prime is 111011122012117. The next prime is 111011122012177. The reversal of 111011122012121 is 121210221110111.

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

It is a cyclic number.

It is not a de Polignac number, because 111011122012121 - 2² = 111011122012117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 111011122012121.

It is not an unprimeable number, because it can be changed into a prime (111011122012111) 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, 7746311 + ... + 16793676.

It is an arithmetic number, because the mean of its divisors is an integer number (14692704315300).

Almost surely, 2^{111011122012121} is an apocalyptic number.

It is an amenable number.

111011122012121 is a deficient number, since it is larger than the sum of its proper divisors (6530512510279).

111011122012121 is a wasteful number, since it uses less digits than its factorization.

111011122012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24806103.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111011122012121 its reverse (121210221110111), we get a palindrome (232221343122232).

The spelling of 111011122012121 in words is "one hundred eleven trillion, eleven billion, one hundred twenty-two million, twelve thousand, one hundred twenty-one".