121230104521 has 2 divisors, whose sum is σ = 121230104522. Its totient is φ = 121230104520.

The previous prime is 121230104519. The next prime is 121230104573. The reversal of 121230104521 is 125401032121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105014883600 + 16215220921 = 324060^2 + 127339^2 .

It is an emirp because it is prime and its reverse (125401032121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121230104521 - 2¹ = 121230104519 is a prime.

Together with 121230104519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121230104492 and 121230104501.

It is not a weakly prime, because it can be changed into another prime (121230107521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615052260 + 60615052261.

It is an arithmetic number, because the mean of its divisors is an integer number (60615052261).

Almost surely, 2^121230104521 is an apocalyptic number.

It is an amenable number.

121230104521 is a deficient number, since it is larger than the sum of its proper divisors (1).

121230104521 is an equidigital number, since it uses as much as digits as its factorization.

121230104521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 121230104521 its reverse (125401032121), we get a palindrome (246631136642).

The spelling of 121230104521 in words is "one hundred twenty-one billion, two hundred thirty million, one hundred four thousand, five hundred twenty-one".