12210855 has 16 divisors (see below), whose sum is σ = 19613664. Its totient is φ = 6487040.

The previous prime is 12210853. The next prime is 12210857. The reversal of 12210855 is 55801221.

It is an interprime number because it is at equal distance from previous prime (12210853) and next prime (12210857).

It is not a de Polignac number, because 12210855 - 2¹ = 12210853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210853) 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, 2767 + ... + 5663.

It is an arithmetic number, because the mean of its divisors is an integer number (1225854).

Almost surely, 2^12210855 is an apocalyptic number.

12210855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12210855 is a deficient number, since it is larger than the sum of its proper divisors (7402809).

12210855 is a wasteful number, since it uses less digits than its factorization.

12210855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 12210855 is about 3494.4033825533. The cubic root of 12210855 is about 230.2760076536.

The spelling of 12210855 in words is "twelve million, two hundred ten thousand, eight hundred fifty-five".