221101112221 has 8 divisors (see below), whose sum is σ = 241929921888. Its totient is φ = 200393754000.

The previous prime is 221101112189. The next prime is 221101112231. The reversal of 221101112221 is 122211101122.

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

It is not a de Polignac number, because 221101112221 - 2⁵ = 221101112189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221101112195 and 221101112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101112231) 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, 30359050 + ... + 30366331.

It is an arithmetic number, because the mean of its divisors is an integer number (30241240236).

Almost surely, 2^221101112221 is an apocalyptic number.

It is an amenable number.

221101112221 is a deficient number, since it is larger than the sum of its proper divisors (20828809667).

221101112221 is a wasteful number, since it uses less digits than its factorization.

221101112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60725723.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221101112221 its reverse (122211101122), we get a palindrome (343312213343).

The spelling of 221101112221 in words is "two hundred twenty-one billion, one hundred one million, one hundred twelve thousand, two hundred twenty-one".