221098109915 has 8 divisors (see below), whose sum is σ = 265510979568. Its totient is φ = 176749656160.

The previous prime is 221098109899. The next prime is 221098109933. The reversal of 221098109915 is 519901890122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221098109915 - 2⁴ = 221098109899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221098109915.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16096421 + ... + 16110150.

It is an arithmetic number, because the mean of its divisors is an integer number (33188872446).

Almost surely, 2^221098109915 is an apocalyptic number.

221098109915 is a deficient number, since it is larger than the sum of its proper divisors (44412869653).

221098109915 is a wasteful number, since it uses less digits than its factorization.

221098109915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32207949.

The product of its (nonzero) digits is 116640, while the sum is 47.

The spelling of 221098109915 in words is "two hundred twenty-one billion, ninety-eight million, one hundred nine thousand, nine hundred fifteen".