12111221232012 has 24 divisors (see below), whose sum is σ = 32296589952256. Its totient is φ = 3460348923408.

The previous prime is 12111221231987. The next prime is 12111221232013. The reversal of 12111221232012 is 21023212211121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12111221232012.

It is not an unprimeable number, because it can be changed into a prime (12111221232013) 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, 72090602488 + ... + 72090602655.

Almost surely, 2^{12111221232012} is an apocalyptic number.

12111221232012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111221232012 is an abundant number, since it is smaller than the sum of its proper divisors (20185368720244).

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

12111221232012 is a wasteful number, since it uses less digits than its factorization.

12111221232012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144181205157 (or 144181205155 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 12111221232012 its reverse (21023212211121), we get a palindrome (33134433443133).

The spelling of 12111221232012 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, two hundred thirty-two thousand, twelve".