12212999 has 4 divisors (see below), whose sum is σ = 12306360. Its totient is φ = 12119640.

The previous prime is 12212983. The next prime is 12213001. The reversal of 12212999 is 99921221.

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 12212999 - 2⁴ = 12212983 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212929) 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 3 ways as a sum of consecutive naturals, for example, 46484 + ... + 46745.

It is an arithmetic number, because the mean of its divisors is an integer number (3076590).

Almost surely, 2^12212999 is an apocalyptic number.

12212999 is a deficient number, since it is larger than the sum of its proper divisors (93361).

12212999 is an equidigital number, since it uses as much as digits as its factorization.

12212999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93360.

The product of its digits is 5832, while the sum is 35.

The square root of 12212999 is about 3494.7101453483. The cubic root of 12212999 is about 230.2894842656.

The spelling of 12212999 in words is "twelve million, two hundred twelve thousand, nine hundred ninety-nine".