396108270221 has 4 divisors (see below), whose sum is σ = 397751873244. Its totient is φ = 394464667200.

The previous prime is 396108270209. The next prime is 396108270253. The reversal of 396108270221 is 122072801693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 206787558121 + 189320712100 = 454739^2 + 435110^2 .

It is a cyclic number.

It is not a de Polignac number, because 396108270221 - 2⁶ = 396108270157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396108270121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821801150 + ... + 821801631.

It is an arithmetic number, because the mean of its divisors is an integer number (99437968311).

Almost surely, 2^396108270221 is an apocalyptic number.

It is an amenable number.

396108270221 is a deficient number, since it is larger than the sum of its proper divisors (1643603023).

396108270221 is a wasteful number, since it uses less digits than its factorization.

396108270221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643603022.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 396108270221 in words is "three hundred ninety-six billion, one hundred eight million, two hundred seventy thousand, two hundred twenty-one".