121000120112021 has 2 divisors, whose sum is σ = 121000120112022. Its totient is φ = 121000120112020.

The previous prime is 121000120111999. The next prime is 121000120112051. The reversal of 121000120112021 is 120211021000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92613484488100 + 28386635623921 = 9623590^2 + 5327911^2 .

It is an emirp because it is prime and its reverse (120211021000121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121000120112021 - 2²⁶ = 121000053003157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121000120111987 and 121000120112005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121000120112051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500060056010 + 60500060056011.

It is an arithmetic number, because the mean of its divisors is an integer number (60500060056011).

Almost surely, 2^{121000120112021} is an apocalyptic number.

It is an amenable number.

121000120112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000120112021 is an equidigital number, since it uses as much as digits as its factorization.

121000120112021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121000120112021 its reverse (120211021000121), we get a palindrome (241211141112142).

The spelling of 121000120112021 in words is "one hundred twenty-one trillion, one hundred twenty million, one hundred twelve thousand, twenty-one".