12212997 has 16 divisors (see below), whose sum is σ = 17087232. Its totient is φ = 7750080.

The previous prime is 12212983. The next prime is 12213001. The reversal of 12212997 is 79921221.

12212997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12212997 - 2⁶ = 12212933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4047 + ... + 6387.

It is an arithmetic number, because the mean of its divisors is an integer number (1067952).

Almost surely, 2^12212997 is an apocalyptic number.

It is an amenable number.

12212997 is a deficient number, since it is larger than the sum of its proper divisors (4874235).

12212997 is a wasteful number, since it uses less digits than its factorization.

12212997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428.

The product of its digits is 4536, while the sum is 33.

The square root of 12212997 is about 3494.7098592015. The cubic root of 12212997 is about 230.2894716949.

The spelling of 12212997 in words is "twelve million, two hundred twelve thousand, nine hundred ninety-seven".