111112121221121 has 8 divisors (see below), whose sum is σ = 116960303992320. Its totient is φ = 105263956089072.

The previous prime is 111112121221103. The next prime is 111112121221147. The reversal of 111112121221121 is 121122121211111.

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 111112121221121 - 2²² = 111112117026817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111112121221093 and 111112121221102.

It is not an unprimeable number, because it can be changed into a prime (111112121221021) 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, 9673376 + ... + 17770718.

It is an arithmetic number, because the mean of its divisors is an integer number (14620037999040).

Almost surely, 2^{111112121221121} is an apocalyptic number.

It is an amenable number.

111112121221121 is a deficient number, since it is larger than the sum of its proper divisors (5848182771199).

111112121221121 is an equidigital number, since it uses as much as digits as its factorization.

111112121221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8819575.

The product of its digits is 32, while the sum is 20.

Adding to 111112121221121 its reverse (121122121211111), we get a palindrome (232234242432232).

The spelling of 111112121221121 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".