121211212 has 12 divisors (see below), whose sum is σ = 216122256. Its totient is φ = 59462000.

The previous prime is 121211183. The next prime is 121211221. The reversal of 121211212 is 212112121.

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

It is a junction number, because it is equal to n+sod(n) for n = 121211192 and 121211201.

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, 285664 + ... + 286087.

It is an arithmetic number, because the mean of its divisors is an integer number (18010188).

Almost surely, 2^121211212 is an apocalyptic number.

It is an amenable number.

121211212 is a deficient number, since it is larger than the sum of its proper divisors (94911044).

121211212 is a wasteful number, since it uses less digits than its factorization.

121211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571808 (or 571806 counting only the distinct ones).

The product of its digits is 16, while the sum is 13.

The square root of 121211212 is about 11009.5963595402. The cubic root of 121211212 is about 494.8963657479.

Adding to 121211212 its reverse (212112121), we get a palindrome (333323333).

Subtracting 121211212 from its reverse (212112121), we obtain a palindrome (90900909).

The spelling of 121211212 in words is "one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".