12121112323320 has 512 divisors, whose sum is σ = 50143073863680. Its totient is φ = 2262091898880.

The previous prime is 12121112323273. The next prime is 12121112323337. The reversal of 12121112323320 is 2332321112121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3080814 + ... + 5808066.

It is an arithmetic number, because the mean of its divisors is an integer number (97935691140).

Almost surely, 2^{12121112323320} is an apocalyptic number.

12121112323320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121112323320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25071536931840).

12121112323320 is an abundant number, since it is smaller than the sum of its proper divisors (38021961540360).

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

12121112323320 is a wasteful number, since it uses less digits than its factorization.

12121112323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727335 (or 2727331 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 12121112323320 its reverse (2332321112121), we get a palindrome (14453433435441).

The spelling of 12121112323320 in words is "twelve trillion, one hundred twenty-one billion, one hundred twelve million, three hundred twenty-three thousand, three hundred twenty".