13121212 has 24 divisors (see below), whose sum is σ = 26184816. Its totient is φ = 5699328.

The previous prime is 13121209. The next prime is 13121219. The reversal of 13121212 is 21212131.

13121212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 13121192 and 13121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6538 + ... + 8305.

It is an arithmetic number, because the mean of its divisors is an integer number (1091034).

Almost surely, 2^13121212 is an apocalyptic number.

It is an amenable number.

13121212 is a deficient number, since it is larger than the sum of its proper divisors (13063604).

13121212 is a wasteful number, since it uses less digits than its factorization.

13121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14877 (or 14875 counting only the distinct ones).

The product of its digits is 24, while the sum is 13.

The square root of 13121212 is about 3622.3213551533. The cubic root of 13121212 is about 235.8620039755.

Adding to 13121212 its reverse (21212131), we get a palindrome (34333343).

It can be divided in two parts, 131 and 21212, that multiplied together give a palindrome (2778772).

The spelling of 13121212 in words is "thirteen million, one hundred twenty-one thousand, two hundred twelve".