121311212 has 18 divisors (see below), whose sum is σ = 233349564. Its totient is φ = 55141240.

The previous prime is 121311209. The next prime is 121311227. The reversal of 121311212 is 212113121.

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 5 ways as a sum of consecutive naturals, for example, 124838 + ... + 125805.

Almost surely, 2^121311212 is an apocalyptic number.

It is an amenable number.

121311212 is a deficient number, since it is larger than the sum of its proper divisors (112038352).

121311212 is a wasteful number, since it uses less digits than its factorization.

121311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250669 (or 250656 counting only the distinct ones).

The product of its digits is 24, while the sum is 14.

The square root of 121311212 is about 11014.1369158005. The cubic root of 121311212 is about 495.0324258594.

Adding to 121311212 its reverse (212113121), we get a palindrome (333424333).

The spelling of 121311212 in words is "one hundred twenty-one million, three hundred eleven thousand, two hundred twelve".