221196297938 has 90 divisors (see below), whose sum is σ = 426148321893. Its totient is φ = 86040699360.

The previous prime is 221196297913. The next prime is 221196297953. The reversal of 221196297938 is 839792691122.

221196297938 is digitally balanced in base 3, 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 2 ways, for example, as 147691870249 + 73504427689 = 384307^2 + 271117^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332563.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 358502606 + ... + 358503222.

Almost surely, 2^221196297938 is an apocalyptic number.

221196297938 is a deficient number, since it is larger than the sum of its proper divisors (204952023955).

221196297938 is an frugal number, since it uses more digits than its factorization.

221196297938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 637 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 59.

The spelling of 221196297938 in words is "two hundred twenty-one billion, one hundred ninety-six million, two hundred ninety-seven thousand, nine hundred thirty-eight".