221644929937312 has 144 divisors (see below), whose sum is σ = 555998974077960. Its totient is φ = 86320134684672.

The previous prime is 221644929937279. The next prime is 221644929937337. The reversal of 221644929937312 is 213739929446122.

221644929937312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 213826396822416 + 7818533114896 = 14622804^2 + 2796164^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142589233 + ... + 144135280.

Almost surely, 2^{221644929937312} is an apocalyptic number.

It is an amenable number.

221644929937312 is an abundant number, since it is smaller than the sum of its proper divisors (334354044140648).

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

221644929937312 is a wasteful number, since it uses less digits than its factorization.

221644929937312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286724583 (or 286724568 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 64.

The spelling of 221644929937312 in words is "two hundred twenty-one trillion, six hundred forty-four billion, nine hundred twenty-nine million, nine hundred thirty-seven thousand, three hundred twelve".