2021527352521 has 2 divisors, whose sum is σ = 2021527352522. Its totient is φ = 2021527352520.

The previous prime is 2021527352519. The next prime is 2021527352707. The reversal of 2021527352521 is 1252537251202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2020915284921 + 612067600 = 1421589^2 + 24740^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021527352521 - 2¹ = 2021527352519 is a prime.

Together with 2021527352519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2021527352821) 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, 1010763676260 + 1010763676261.

It is an arithmetic number, because the mean of its divisors is an integer number (1010763676261).

Almost surely, 2^{2021527352521} is an apocalyptic number.

It is an amenable number.

2021527352521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021527352521 is an equidigital number, since it uses as much as digits as its factorization.

2021527352521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 2021527352521 in words is "two trillion, twenty-one billion, five hundred twenty-seven million, three hundred fifty-two thousand, five hundred twenty-one".