111122120012121 has 28 divisors (see below), whose sum is σ = 168256538590500. Its totient is φ = 73347933952800.

The previous prime is 111122120012023. The next prime is 111122120012207. The reversal of 111122120012121 is 121210021221111.

It is a happy number.

111122120012121 is a `hidden beast` number, since 1 + 111 + 221 + 200 + 12 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 69152712587721 + 41969407424400 = 8315811^2 + 6478380^2 .

It is not a de Polignac number, because 111122120012121 - 2¹⁴ = 111122119995737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111122120012094 and 111122120012103.

It is not an unprimeable number, because it can be changed into a prime (111122120012821) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 754534746 + ... + 754682003.

Almost surely, 2^{111122120012121} is an apocalyptic number.

It is an amenable number.

111122120012121 is a deficient number, since it is larger than the sum of its proper divisors (57134418578379).

111122120012121 is an equidigital number, since it uses as much as digits as its factorization.

111122120012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509216868 (or 1509216853 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111122120012121 its reverse (121210021221111), we get a palindrome (232332141233232).

The spelling of 111122120012121 in words is "one hundred eleven trillion, one hundred twenty-two billion, one hundred twenty million, twelve thousand, one hundred twenty-one".