121112211212 has 12 divisors (see below), whose sum is σ = 211949168256. Its totient is φ = 60555306000.

The previous prime is 121112211203. The next prime is 121112211217. The reversal of 121112211212 is 212112211121.

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

It is not an unprimeable number, because it can be changed into a prime (121112211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256853 + ... + 555155.

It is an arithmetic number, because the mean of its divisors is an integer number (17662430688).

Almost surely, 2^121112211212 is an apocalyptic number.

It is an amenable number.

121112211212 is a deficient number, since it is larger than the sum of its proper divisors (90836957044).

121112211212 is a wasteful number, since it uses less digits than its factorization.

121112211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399808 (or 399806 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 121112211212 its reverse (212112211121), we get a palindrome (333224422333).

Subtracting 121112211212 from its reverse (212112211121), we obtain a palindrome (90999999909).

The spelling of 121112211212 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred eleven thousand, two hundred twelve".