12212071 has 4 divisors (see below), whose sum is σ = 12384144. Its totient is φ = 12040000.

The previous prime is 12212063. The next prime is 12212077. The reversal of 12212071 is 17021221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12212071 - 2³ = 12212063 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 (12212077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85930 + ... + 86071.

It is an arithmetic number, because the mean of its divisors is an integer number (3096036).

Almost surely, 2^12212071 is an apocalyptic number.

12212071 is a deficient number, since it is larger than the sum of its proper divisors (172073).

12212071 is an equidigital number, since it uses as much as digits as its factorization.

12212071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172072.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 12212071 is about 3494.5773707274. The cubic root of 12212071 is about 230.2836512988.

Adding to 12212071 its reverse (17021221), we get a palindrome (29233292).

The spelling of 12212071 in words is "twelve million, two hundred twelve thousand, seventy-one".