121320213312 has 56 divisors (see below), whose sum is σ = 339875018496. Its totient is φ = 38061242368.

The previous prime is 121320213307. The next prime is 121320213319. The reversal of 121320213312 is 213312023121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121320213319) 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, 18581328 + ... + 18587855.

Almost surely, 2^121320213312 is an apocalyptic number.

121320213312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121320213312 is an abundant number, since it is smaller than the sum of its proper divisors (218554805184).

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

121320213312 is a wasteful number, since it uses less digits than its factorization.

121320213312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37169215 (or 37169205 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121320213312 its reverse (213312023121), we get a palindrome (334632236433).

The spelling of 121320213312 in words is "one hundred twenty-one billion, three hundred twenty million, two hundred thirteen thousand, three hundred twelve".