121321233010121 has 2 divisors, whose sum is σ = 121321233010122. Its totient is φ = 121321233010120.

The previous prime is 121321233010111. The next prime is 121321233010123. The reversal of 121321233010121 is 121010332123121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120015618266896 + 1305614743225 = 10955164^2 + 1142635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121321233010121 is a prime.

Together with 121321233010123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121321233010123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660616505060 + 60660616505061.

It is an arithmetic number, because the mean of its divisors is an integer number (60660616505061).

Almost surely, 2^{121321233010121} is an apocalyptic number.

It is an amenable number.

121321233010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321233010121 is an equidigital number, since it uses as much as digits as its factorization.

121321233010121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 121321233010121 its reverse (121010332123121), we get a palindrome (242331565133242).

The spelling of 121321233010121 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, two hundred thirty-three million, ten thousand, one hundred twenty-one".