12042321012 has 72 divisors (see below), whose sum is σ = 31674779136. Its totient is φ = 3854545344.

The previous prime is 12042320999. The next prime is 12042321013. The reversal of 12042321012 is 21012324021.

It is a happy number.

12042321012 is a `hidden beast` number, since 1 + 20 + 423 + 210 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12042321013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22533 + ... + 156819.

It is an arithmetic number, because the mean of its divisors is an integer number (439927488).

Almost surely, 2^12042321012 is an apocalyptic number.

12042321012 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 12042321012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15837389568).

12042321012 is an abundant number, since it is smaller than the sum of its proper divisors (19632458124).

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

12042321012 is a wasteful number, since it uses less digits than its factorization.

12042321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134397 (or 134392 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12042321012 its reverse (21012324021), we get a palindrome (33054645033).

The spelling of 12042321012 in words is "twelve billion, forty-two million, three hundred twenty-one thousand, twelve".