12220471 has 8 divisors (see below), whose sum is σ = 12844304. Its totient is φ = 11612160.

The previous prime is 12220457. The next prime is 12220489. The reversal of 12220471 is 17402221.

It is a happy number.

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 12220471 - 2¹³ = 12212279 is a prime.

It is a super-3 number, since 3×12220471³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220421) 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, 2250 + ... + 5431.

It is an arithmetic number, because the mean of its divisors is an integer number (1605538).

Almost surely, 2^12220471 is an apocalyptic number.

12220471 is a deficient number, since it is larger than the sum of its proper divisors (623833).

12220471 is an equidigital number, since it uses as much as digits as its factorization.

12220471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7761.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12220471 is about 3495.7790261972. The cubic root of 12220471 is about 230.3364389415.

Adding to 12220471 its reverse (17402221), we get a palindrome (29622692).

The spelling of 12220471 in words is "twelve million, two hundred twenty thousand, four hundred seventy-one".