121311203312 has 80 divisors (see below), whose sum is σ = 279662725440. Its totient is φ = 50405093376.

The previous prime is 121311203309. The next prime is 121311203333. The reversal of 121311203312 is 213302113121.

It is a happy number.

121311203312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664487 + ... + 827142.

It is an arithmetic number, because the mean of its divisors is an integer number (3495784068).

Almost surely, 2^121311203312 is an apocalyptic number.

It is an amenable number.

121311203312 is an abundant number, since it is smaller than the sum of its proper divisors (158351522128).

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

121311203312 is a wasteful number, since it uses less digits than its factorization.

121311203312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491690 (or 1491684 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121311203312 its reverse (213302113121), we get a palindrome (334613316433).

The spelling of 121311203312 in words is "one hundred twenty-one billion, three hundred eleven million, two hundred three thousand, three hundred twelve".