212201111 has 8 divisors (see below), whose sum is σ = 216905040. Its totient is φ = 207534208.

The previous prime is 212201071. The next prime is 212201137. The reversal of 212201111 is 111102212.

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 212201111 - 2⁶ = 212201047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212201092 and 212201101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201411) 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, 2495 + ... + 20751.

It is an arithmetic number, because the mean of its divisors is an integer number (27113130).

Almost surely, 2^212201111 is an apocalyptic number.

212201111 is a deficient number, since it is larger than the sum of its proper divisors (4703929).

212201111 is a wasteful number, since it uses less digits than its factorization.

212201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18513.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 212201111 is about 14567.1243215674. The cubic root of 212201111 is about 596.4616850816.

Adding to 212201111 its reverse (111102212), we get a palindrome (323303323).

The spelling of 212201111 in words is "two hundred twelve million, two hundred one thousand, one hundred eleven".