20124442095521 has 2 divisors, whose sum is σ = 20124442095522. Its totient is φ = 20124442095520.

The previous prime is 20124442095479. The next prime is 20124442095533. The reversal of 20124442095521 is 12559024442102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10097650182400 + 10026791913121 = 3177680^2 + 3166511^2 .

It is a cyclic number.

It is not a de Polignac number, because 20124442095521 - 2³⁸ = 19849564188577 is a prime.

It is a super-2 number, since 2×20124442095521² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20124442095421) 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, 10062221047760 + 10062221047761.

It is an arithmetic number, because the mean of its divisors is an integer number (10062221047761).

Almost surely, 2^{20124442095521} is an apocalyptic number.

It is an amenable number.

20124442095521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124442095521 is an equidigital number, since it uses as much as digits as its factorization.

20124442095521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 20124442095521 in words is "twenty trillion, one hundred twenty-four billion, four hundred forty-two million, ninety-five thousand, five hundred twenty-one".