221187648908 has 12 divisors (see below), whose sum is σ = 387873211152. Its totient is φ = 110366731440.

The previous prime is 221187648833. The next prime is 221187648949. The reversal of 221187648908 is 809846781122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56771063 + ... + 56774958.

It is an arithmetic number, because the mean of its divisors is an integer number (32322767596).

Almost surely, 2^221187648908 is an apocalyptic number.

It is an amenable number.

221187648908 is a deficient number, since it is larger than the sum of its proper divisors (166685562244).

221187648908 is a wasteful number, since it uses less digits than its factorization.

221187648908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113546512 (or 113546510 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 221187648908 in words is "two hundred twenty-one billion, one hundred eighty-seven million, six hundred forty-eight thousand, nine hundred eight".