221098109916 has 12 divisors (see below), whose sum is σ = 515895589832. Its totient is φ = 73699369968.

The previous prime is 221098109899. The next prime is 221098109933. The reversal of 221098109916 is 619901890122.

It is an interprime number because it is at equal distance from previous prime (221098109899) and next prime (221098109933).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 9212421235 + ... + 9212421258.

Almost surely, 2^221098109916 is an apocalyptic number.

It is an amenable number.

221098109916 is an abundant number, since it is smaller than the sum of its proper divisors (294797479916).

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

221098109916 is a wasteful number, since it uses less digits than its factorization.

221098109916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18424842500 (or 18424842498 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 48.

The spelling of 221098109916 in words is "two hundred twenty-one billion, ninety-eight million, one hundred nine thousand, nine hundred sixteen".