121213123312 has 40 divisors (see below), whose sum is σ = 245747227520. Its totient is φ = 57848048640.

The previous prime is 121213123267. The next prime is 121213123313. The reversal of 121213123312 is 213321312121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213123313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1637637 + ... + 1710052.

It is an arithmetic number, because the mean of its divisors is an integer number (6143680688).

Almost surely, 2^121213123312 is an apocalyptic number.

It is an amenable number.

121213123312 is an abundant number, since it is smaller than the sum of its proper divisors (124534104208).

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

121213123312 is a wasteful number, since it uses less digits than its factorization.

121213123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347801 (or 3347795 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 121213123312 its reverse (213321312121), we get a palindrome (334534435433).

The spelling of 121213123312 in words is "one hundred twenty-one billion, two hundred thirteen million, one hundred twenty-three thousand, three hundred twelve".