13421185087081 has 2 divisors, whose sum is σ = 13421185087082. Its totient is φ = 13421185087080.

The previous prime is 13421185087073. The next prime is 13421185087169. The reversal of 13421185087081 is 18078058112431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9452802360681 + 3968382726400 = 3074541^2 + 1992080^2 .

It is a cyclic number.

It is not a de Polignac number, because 13421185087081 - 2³ = 13421185087073 is a prime.

It is a super-2 number, since 2×13421185087081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13421185087021) 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, 6710592543540 + 6710592543541.

It is an arithmetic number, because the mean of its divisors is an integer number (6710592543541).

Almost surely, 2^{13421185087081} is an apocalyptic number.

It is an amenable number.

13421185087081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13421185087081 is an equidigital number, since it uses as much as digits as its factorization.

13421185087081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 430080, while the sum is 49.

The spelling of 13421185087081 in words is "thirteen trillion, four hundred twenty-one billion, one hundred eighty-five million, eighty-seven thousand, eighty-one".