13421012410021 has 2 divisors, whose sum is σ = 13421012410022. Its totient is φ = 13421012410020.

The previous prime is 13421012410007. The next prime is 13421012410079. The reversal of 13421012410021 is 12001421012431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12918453350625 + 502559059396 = 3594225^2 + 708914^2 .

It is an emirp because it is prime and its reverse (12001421012431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13421012410021 - 2⁵ = 13421012409989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13421012409974 and 13421012410001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13421022410021) 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 as a sum of consecutive naturals, namely, 6710506205010 + 6710506205011.

It is an arithmetic number, because the mean of its divisors is an integer number (6710506205011).

Almost surely, 2^{13421012410021} is an apocalyptic number.

It is an amenable number.

13421012410021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13421012410021 is an equidigital number, since it uses as much as digits as its factorization.

13421012410021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 13421012410021 its reverse (12001421012431), we get a palindrome (25422433422452).

The spelling of 13421012410021 in words is "thirteen trillion, four hundred twenty-one billion, twelve million, four hundred ten thousand, twenty-one".