12213012 has 48 divisors (see below), whose sum is σ = 32739840. Its totient is φ = 3471072.

The previous prime is 12213007. The next prime is 12213013. The reversal of 12213012 is 21031221.

12213012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12213012² = 298315324224288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213013) 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, 28939 + ... + 29357.

It is an arithmetic number, because the mean of its divisors is an integer number (682080).

Almost surely, 2^12213012 is an apocalyptic number.

12213012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12213012 is an abundant number, since it is smaller than the sum of its proper divisors (20526828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12213012 is a wasteful number, since it uses less digits than its factorization.

12213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12213012 is about 3494.7120053017. The cubic root of 12213012 is about 230.2895659753.

Adding to 12213012 its reverse (21031221), we get a palindrome (33244233).

The spelling of 12213012 in words is "twelve million, two hundred thirteen thousand, twelve".