121002221211121 has 4 divisors (see below), whose sum is σ = 121006305152500. Its totient is φ = 120998137269744.

The previous prime is 121002221211119. The next prime is 121002221211133. The reversal of 121002221211121 is 121112122200121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 117144061002721 + 3858160208400 = 10823311^2 + 1964220^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002221211121 - 2¹ = 121002221211119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121002221211721) 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 3 ways as a sum of consecutive naturals, for example, 2041926246 + ... + 2041985503.

It is an arithmetic number, because the mean of its divisors is an integer number (30251576288125).

Almost surely, 2^{121002221211121} is an apocalyptic number.

It is an amenable number.

121002221211121 is a deficient number, since it is larger than the sum of its proper divisors (4083941379).

121002221211121 is an equidigital number, since it uses as much as digits as its factorization.

121002221211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083941378.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121002221211121 its reverse (121112122200121), we get a palindrome (242114343411242).

The spelling of 121002221211121 in words is "one hundred twenty-one trillion, two billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twenty-one".