121331212 has 12 divisors (see below), whose sum is σ = 213517080. Its totient is φ = 60326336.

The previous prime is 121331191. The next prime is 121331213. The reversal of 121331212 is 212133121.

It is not an unprimeable number, because it can be changed into a prime (121331213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84013 + ... + 85444.

It is an arithmetic number, because the mean of its divisors is an integer number (17793090).

Almost surely, 2^121331212 is an apocalyptic number.

It is an amenable number.

121331212 is a deficient number, since it is larger than the sum of its proper divisors (92185868).

121331212 is a wasteful number, since it uses less digits than its factorization.

121331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169640 (or 169638 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 121331212 is about 11015.0448024509. The cubic root of 121331212 is about 495.0596289082.

Adding to 121331212 its reverse (212133121), we get a palindrome (333464333).

It can be divided in two parts, 12133121 and 2, that multiplied together give a palindrome (24266242).

The spelling of 121331212 in words is "one hundred twenty-one million, three hundred thirty-one thousand, two hundred twelve".