121021000320013 has 2 divisors, whose sum is σ = 121021000320014. Its totient is φ = 121021000320012.

The previous prime is 121021000319977. The next prime is 121021000320047. The reversal of 121021000320013 is 310023000120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91368325107684 + 29652675212329 = 9558678^2 + 5445427^2 .

It is an emirp because it is prime and its reverse (310023000120121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021000320013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121021000320113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510500160006 + 60510500160007.

It is an arithmetic number, because the mean of its divisors is an integer number (60510500160007).

Almost surely, 2^{121021000320013} is an apocalyptic number.

It is an amenable number.

121021000320013 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021000320013 is an equidigital number, since it uses as much as digits as its factorization.

121021000320013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121021000320013 its reverse (310023000120121), we get a palindrome (431044000440134).

The spelling of 121021000320013 in words is "one hundred twenty-one trillion, twenty-one billion, three hundred twenty thousand, thirteen".