2021522664402 has 48 divisors (see below), whose sum is σ = 4647293015040. Its totient is φ = 632879127936.

The previous prime is 2021522664397. The next prime is 2021522664409. The reversal of 2021522664402 is 2044662251202.

2021522664402 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 5 + 2 + 2 + 6 + 644 + 0 + 2 = 666.

It is a super-2 number, since 2×2021522664402² (a number of 25 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 6749338 + ... + 7042485.

It is an arithmetic number, because the mean of its divisors is an integer number (96818604480).

Almost surely, 2^{2021522664402} is an apocalyptic number.

2021522664402 is an abundant number, since it is smaller than the sum of its proper divisors (2625770350638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021522664402 is a wasteful number, since it uses less digits than its factorization.

2021522664402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13792327 (or 13792324 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 2021522664402 in words is "two trillion, twenty-one billion, five hundred twenty-two million, six hundred sixty-four thousand, four hundred two".