221323204396 has 12 divisors (see below), whose sum is σ = 442646408848. Its totient is φ = 94852801872.

The previous prime is 221323204393. The next prime is 221323204397. The reversal of 221323204396 is 693402323122.

221323204396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

221323204396 is an admirable number.

It is a super-2 number, since 2×221323204396² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221323204393) 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, 3952200051 + ... + 3952200106.

Almost surely, 2^221323204396 is an apocalyptic number.

It is an amenable number.

221323204396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221323204396 is a wasteful number, since it uses less digits than its factorization.

221323204396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7904400168 (or 7904400166 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 221323204396 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred four thousand, three hundred ninety-six".