221101085 has 8 divisors (see below), whose sum is σ = 272492376. Its totient is φ = 172100160.

The previous prime is 221101073. The next prime is 221101087. The reversal of 221101085 is 580101122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19971961 + 201129124 = 4469^2 + 14182^2 .

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

It is not a de Polignac number, because 221101085 - 2⁸ = 221100829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597386 + ... + 597755.

It is an arithmetic number, because the mean of its divisors is an integer number (34061547).

Almost surely, 2^221101085 is an apocalyptic number.

It is an amenable number.

221101085 is a deficient number, since it is larger than the sum of its proper divisors (51391291).

221101085 is a wasteful number, since it uses less digits than its factorization.

221101085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195183.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 221101085 is about 14869.4682151044. The cubic root of 221101085 is about 604.6865256724.

The spelling of 221101085 in words is "two hundred twenty-one million, one hundred one thousand, eighty-five".