121212110012 has 12 divisors (see below), whose sum is σ = 242424220080. Its totient is φ = 51948047136.

The previous prime is 121212110009. The next prime is 121212110039. The reversal of 121212110012 is 210011212121.

121212110012 is an admirable number.

It is a super-2 number, since 2×121212110012² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 2164501937 + ... + 2164501992.

It is an arithmetic number, because the mean of its divisors is an integer number (20202018340).

Almost surely, 2^121212110012 is an apocalyptic number.

It is an amenable number.

121212110012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121212110012 is a wasteful number, since it uses less digits than its factorization.

121212110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329003940 (or 4329003938 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121212110012 its reverse (210011212121), we get a palindrome (331223322133).

The spelling of 121212110012 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, twelve".