221298539216 has 10 divisors (see below), whose sum is σ = 428765919762. Its totient is φ = 110649269600.

The previous prime is 221298539201. The next prime is 221298539299. The reversal of 221298539216 is 612935892122.

It can be written as a sum of positive squares in only one way, i.e., 139562016400 + 81736522816 = 373580^2 + 285896^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6915579335 + ... + 6915579366.

Almost surely, 2^221298539216 is an apocalyptic number.

It is an amenable number.

221298539216 is a deficient number, since it is larger than the sum of its proper divisors (207467380546).

221298539216 is a wasteful number, since it uses less digits than its factorization.

221298539216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13831158709 (or 13831158703 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The spelling of 221298539216 in words is "two hundred twenty-one billion, two hundred ninety-eight million, five hundred thirty-nine thousand, two hundred sixteen".