121212412 has 12 divisors (see below), whose sum is σ = 215028016. Its totient is φ = 59775840.

The previous prime is 121212391. The next prime is 121212439. The reversal of 121212412 is 214212121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207264 + ... + 207847.

Almost surely, 2^121212412 is an apocalyptic number.

It is an amenable number.

121212412 is a deficient number, since it is larger than the sum of its proper divisors (93815604).

121212412 is a wasteful number, since it uses less digits than its factorization.

121212412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415188 (or 415186 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 121212412 is about 11009.6508573160. The cubic root of 121212412 is about 494.8979989128.

Adding to 121212412 its reverse (214212121), we get a palindrome (335424533).

The spelling of 121212412 in words is "one hundred twenty-one million, two hundred twelve thousand, four hundred twelve".