12121323032112 has 160 divisors (see below), whose sum is σ = 36335086977024. Its totient is φ = 3410211974400.

The previous prime is 12121323032111. The next prime is 12121323032123. The reversal of 12121323032112 is 21123032312121.

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

It is not an unprimeable number, because it can be changed into a prime (12121323032111) 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, 58224687 + ... + 58432497.

Almost surely, 2^{12121323032112} is an apocalyptic number.

12121323032112 is a gapful number since it is divisible by the number (12) 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 12121323032112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18167543488512).

12121323032112 is an abundant number, since it is smaller than the sum of its proper divisors (24213763944912).

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

12121323032112 is a wasteful number, since it uses less digits than its factorization.

12121323032112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210487 (or 210481 counting only the distinct ones).

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

Adding to 12121323032112 its reverse (21123032312121), we get a palindrome (33244355344233).

The spelling of 12121323032112 in words is "twelve trillion, one hundred twenty-one billion, three hundred twenty-three million, thirty-two thousand, one hundred twelve".