121123132312 has 128 divisors (see below), whose sum is σ = 308825395200. Its totient is φ = 43137312768.

The previous prime is 121123132309. The next prime is 121123132313. The reversal of 121123132312 is 213231321121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123132313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71889 + ... + 497407.

It is an arithmetic number, because the mean of its divisors is an integer number (2412698400).

Almost surely, 2^121123132312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121123132312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154412697600).

121123132312 is an abundant number, since it is smaller than the sum of its proper divisors (187702262888).

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

121123132312 is a wasteful number, since it uses less digits than its factorization.

121123132312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425585 (or 425581 counting only the distinct ones).

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

Adding to 121123132312 its reverse (213231321121), we get a palindrome (334354453433).

The spelling of 121123132312 in words is "one hundred twenty-one billion, one hundred twenty-three million, one hundred thirty-two thousand, three hundred twelve".