312121020121212 has 12 divisors (see below), whose sum is σ = 728282380282856. Its totient is φ = 104040340040400.

The previous prime is 312121020121201. The next prime is 312121020121223. The reversal of 312121020121212 is 212121020121213.

It is an interprime number because it is at equal distance from previous prime (312121020121201) and next prime (312121020121223).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13005042505039 + ... + 13005042505062.

Almost surely, 2^{312121020121212} is an apocalyptic number.

It is an amenable number.

312121020121212 is an abundant number, since it is smaller than the sum of its proper divisors (416161360161644).

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

312121020121212 is a wasteful number, since it uses less digits than its factorization.

312121020121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26010085010108 (or 26010085010106 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 312121020121212 its reverse (212121020121213), we get a palindrome (524242040242425).

Subtracting from 312121020121212 its reverse (212121020121213), we obtain a palindrome (99999999999999).

The spelling of 312121020121212 in words is "three hundred twelve trillion, one hundred twenty-one billion, twenty million, one hundred twenty-one thousand, two hundred twelve".