376823821221 has 20 divisors (see below), whose sum is σ = 566163492972. Its totient is φ = 249763756608.

The previous prime is 376823821147. The next prime is 376823821249. The reversal of 376823821221 is 122128328673.

376823821221 is a `hidden beast` number, since 3 + 76 + 82 + 382 + 122 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 365021388900 + 11802432321 = 604170^2 + 108639^2 .

It is not a de Polignac number, because 376823821221 - 2¹¹ = 376823819173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (376823821321) 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 19 ways as a sum of consecutive naturals, for example, 13431496 + ... + 13459521.

Almost surely, 2^376823821221 is an apocalyptic number.

It is an amenable number.

376823821221 is a deficient number, since it is larger than the sum of its proper divisors (189339671751).

376823821221 is a wasteful number, since it uses less digits than its factorization.

376823821221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26891202 (or 26891193 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 376823821221 in words is "three hundred seventy-six billion, eight hundred twenty-three million, eight hundred twenty-one thousand, two hundred twenty-one".