12212101 has 8 divisors (see below), whose sum is σ = 13574304. Its totient is φ = 10891920.

The previous prime is 12212087. The next prime is 12212107. The reversal of 12212101 is 10121221.

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 12212101 - 2¹⁷ = 12081029 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 (12212107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9891 + ... + 11056.

It is an arithmetic number, because the mean of its divisors is an integer number (1696788).

Almost surely, 2^12212101 is an apocalyptic number.

12212101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212101 is a deficient number, since it is larger than the sum of its proper divisors (1362203).

12212101 is a wasteful number, since it uses less digits than its factorization.

12212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21011.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 12212101 is about 3494.5816630893. The cubic root of 12212101 is about 230.2838398691.

Adding to 12212101 its reverse (10121221), we get a palindrome (22333322).

The spelling of 12212101 in words is "twelve million, two hundred twelve thousand, one hundred one".