12212512 has 48 divisors (see below), whose sum is σ = 26756352. Its totient is φ = 5448960.

The previous prime is 12212507. The next prime is 12212521. The reversal of 12212512 is 21521221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12423 + ... + 13369.

It is an arithmetic number, because the mean of its divisors is an integer number (557424).

Almost surely, 2^12212512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12212512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13378176).

12212512 is an abundant number, since it is smaller than the sum of its proper divisors (14543840).

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

12212512 is a wasteful number, since it uses less digits than its factorization.

12212512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 993 counting only the distinct ones).

The product of its digits is 80, while the sum is 16.

The square root of 12212512 is about 3494.6404679165. The cubic root of 12212512 is about 230.2864232520.

Adding to 12212512 its reverse (21521221), we get a palindrome (33733733).

The spelling of 12212512 in words is "twelve million, two hundred twelve thousand, five hundred twelve".