10021540525481 has 2 divisors, whose sum is σ = 10021540525482. Its totient is φ = 10021540525480.

The previous prime is 10021540525301. The next prime is 10021540525487. The reversal of 10021540525481 is 18452504512001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9179330527081 + 842209998400 = 3029741^2 + 917720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10021540525481 is a prime.

It is a super-2 number, since 2×10021540525481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10021540525487) 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, 5010770262740 + 5010770262741.

It is an arithmetic number, because the mean of its divisors is an integer number (5010770262741).

Almost surely, 2^{10021540525481} is an apocalyptic number.

It is an amenable number.

10021540525481 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021540525481 is an equidigital number, since it uses as much as digits as its factorization.

10021540525481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64000, while the sum is 38.

The spelling of 10021540525481 in words is "ten trillion, twenty-one billion, five hundred forty million, five hundred twenty-five thousand, four hundred eighty-one".