13131212 has 12 divisors (see below), whose sum is σ = 23207856. Its totient is φ = 6500400.

The previous prime is 13131203. The next prime is 13131233. The reversal of 13131212 is 21213131.

13131212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15848 + ... + 16655.

It is an arithmetic number, because the mean of its divisors is an integer number (1933988).

Almost surely, 2^13131212 is an apocalyptic number.

It is an amenable number.

13131212 is a deficient number, since it is larger than the sum of its proper divisors (10076644).

13131212 is a wasteful number, since it uses less digits than its factorization.

13131212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32608 (or 32606 counting only the distinct ones).

The product of its digits is 36, while the sum is 14.

The square root of 13131212 is about 3623.7014225789. The cubic root of 13131212 is about 235.9219075145.

Adding to 13131212 its reverse (21213131), we get a palindrome (34344343).

The spelling of 13131212 in words is "thirteen million, one hundred thirty-one thousand, two hundred twelve".