2021522664401 has 8 divisors (see below), whose sum is σ = 2026782973800. Its totient is φ = 2016265724928.

The previous prime is 2021522664397. The next prime is 2021522664409. The reversal of 2021522664401 is 1044662251202.

It can be written as a sum of positive squares in 4 ways, for example, as 73753523776 + 1947769140625 = 271576^2 + 1395625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021522664401 - 2² = 2021522664397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021522664409) 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 in 7 ways as a sum of consecutive naturals, for example, 361055 + ... + 2042891.

It is an arithmetic number, because the mean of its divisors is an integer number (253347871725).

Almost surely, 2^{2021522664401} is an apocalyptic number.

It is an amenable number.

2021522664401 is a deficient number, since it is larger than the sum of its proper divisors (5260309399).

2021522664401 is a wasteful number, since it uses less digits than its factorization.

2021522664401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684963.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 2021522664401 in words is "two trillion, twenty-one billion, five hundred twenty-two million, six hundred sixty-four thousand, four hundred one".