211112112221 has 8 divisors (see below), whose sum is σ = 213629475840. Its totient is φ = 208605304368.

The previous prime is 211112112217. The next prime is 211112112227. The reversal of 211112112221 is 122211211112.

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 211112112221 - 2² = 211112112217 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 211112112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112112227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2598701 + ... + 2678706.

It is an arithmetic number, because the mean of its divisors is an integer number (26703684480).

Almost surely, 2^211112112221 is an apocalyptic number.

It is an amenable number.

211112112221 is a deficient number, since it is larger than the sum of its proper divisors (2517363619).

211112112221 is a wasteful number, since it uses less digits than its factorization.

211112112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277883.

The product of its digits is 32, while the sum is 17.

Adding to 211112112221 its reverse (122211211112), we get a palindrome (333323323333).

The spelling of 211112112221 in words is "two hundred eleven billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty-one".