12151212 has 12 divisors (see below), whose sum is σ = 28352856. Its totient is φ = 4050400.

The previous prime is 12151189. The next prime is 12151231. The reversal of 12151212 is 21215121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12151191 and 12151200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506289 + ... + 506312.

It is an arithmetic number, because the mean of its divisors is an integer number (2362738).

Almost surely, 2^12151212 is an apocalyptic number.

12151212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12151212 is an abundant number, since it is smaller than the sum of its proper divisors (16201644).

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

12151212 is a wasteful number, since it uses less digits than its factorization.

12151212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012608 (or 1012606 counting only the distinct ones).

The product of its digits is 40, while the sum is 15.

The square root of 12151212 is about 3485.8588611704. The cubic root of 12151212 is about 229.9004736370.

Adding to 12151212 its reverse (21215121), we get a palindrome (33366333).

The spelling of 12151212 in words is "twelve million, one hundred fifty-one thousand, two hundred twelve".