221116018685 has 8 divisors (see below), whose sum is σ = 265360478976. Its totient is φ = 176878643920.

The previous prime is 221116018663. The next prime is 221116018691. The reversal of 221116018685 is 586810611122.

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

It is not a de Polignac number, because 221116018685 - 2¹² = 221116014589 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1702481 + ... + 1827750.

It is an arithmetic number, because the mean of its divisors is an integer number (33170059872).

Almost surely, 2^221116018685 is an apocalyptic number.

It is an amenable number.

221116018685 is a deficient number, since it is larger than the sum of its proper divisors (44244460291).

221116018685 is a wasteful number, since it uses less digits than its factorization.

221116018685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3542763.

The product of its (nonzero) digits is 46080, while the sum is 41.

The spelling of 221116018685 in words is "two hundred twenty-one billion, one hundred sixteen million, eighteen thousand, six hundred eighty-five".