121110021221121 has 8 divisors (see below), whose sum is σ = 179422253660960. Its totient is φ = 80740014147396.

The previous prime is 121110021221093. The next prime is 121110021221129. The reversal of 121110021221121 is 121122120011121.

It is a happy number.

121110021221121 is a `hidden beast` number, since 1 + 211 + 10 + 0 + 212 + 211 + 21 = 666.

It is not a de Polignac number, because 121110021221121 - 2⁵ = 121110021221089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121110021221094 and 121110021221103.

It is not an unprimeable number, because it can be changed into a prime (121110021221129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2242778170735 + ... + 2242778170788.

It is an arithmetic number, because the mean of its divisors is an integer number (22427781707620).

Almost surely, 2^{121110021221121} is an apocalyptic number.

It is an amenable number.

121110021221121 is a deficient number, since it is larger than the sum of its proper divisors (58312232439839).

121110021221121 is an equidigital number, since it uses as much as digits as its factorization.

121110021221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485556341532 (or 4485556341526 counting only the distinct ones).

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

Adding to 121110021221121 its reverse (121122120011121), we get a palindrome (242232141232242).

The spelling of 121110021221121 in words is "one hundred twenty-one trillion, one hundred ten billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".