12212871 has 16 divisors (see below), whose sum is σ = 18058368. Its totient is φ = 7279200.

The previous prime is 12212867. The next prime is 12212881. The reversal of 12212871 is 17821221.

It is not a de Polignac number, because 12212871 - 2² = 12212867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212831) 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 15 ways as a sum of consecutive naturals, for example, 1021 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (1128648).

Almost surely, 2^12212871 is an apocalyptic number.

12212871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12212871 is a deficient number, since it is larger than the sum of its proper divisors (5845497).

12212871 is a wasteful number, since it uses less digits than its factorization.

12212871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6142.

The product of its digits is 448, while the sum is 24.

The square root of 12212871 is about 3494.6918319074. The cubic root of 12212871 is about 230.2886797360.

The spelling of 12212871 in words is "twelve million, two hundred twelve thousand, eight hundred seventy-one".