211111102112221 has 8 divisors (see below), whose sum is σ = 211397503674240. Its totient is φ = 210824890665312.

The previous prime is 211111102112203. The next prime is 211111102112243. The reversal of 211111102112221 is 122211201111112.

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

It is a cyclic number.

It is not a de Polignac number, because 211111102112221 - 2²³ = 211111093723613 is a prime.

It is a super-3 number, since 3×211111102112221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111102112201) 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, 45306325 + ... + 49748218.

It is an arithmetic number, because the mean of its divisors is an integer number (26424687959280).

Almost surely, 2^{211111102112221} is an apocalyptic number.

It is an amenable number.

211111102112221 is a deficient number, since it is larger than the sum of its proper divisors (286401562019).

211111102112221 is a wasteful number, since it uses less digits than its factorization.

211111102112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95057555.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211111102112221 its reverse (122211201111112), we get a palindrome (333322303223333).

The spelling of 211111102112221 in words is "two hundred eleven trillion, one hundred eleven billion, one hundred two million, one hundred twelve thousand, two hundred twenty-one".