2021592608081 has 2 divisors, whose sum is σ = 2021592608082. Its totient is φ = 2021592608080.

The previous prime is 2021592608041. The next prime is 2021592608083. The reversal of 2021592608081 is 1808062951202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1561150291600 + 460442316481 = 1249460^2 + 678559^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021592608081 - 2⁶ = 2021592608017 is a prime.

It is a super-2 number, since 2×2021592608081² (a number of 25 digits) contains 22 as substring.

Together with 2021592608083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2021592608083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010796304040 + 1010796304041.

It is an arithmetic number, because the mean of its divisors is an integer number (1010796304041).

Almost surely, 2^{2021592608081} is an apocalyptic number.

It is an amenable number.

2021592608081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021592608081 is an equidigital number, since it uses as much as digits as its factorization.

2021592608081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 2021592608081 in words is "two trillion, twenty-one billion, five hundred ninety-two million, six hundred eight thousand, eighty-one".