12012221982 has 16 divisors (see below), whose sum is σ = 24138306432. Its totient is φ = 3985096920.

The previous prime is 12012221929. The next prime is 12012221987. The reversal of 12012221982 is 28912221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012221987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4742898 + ... + 4745429.

It is an arithmetic number, because the mean of its divisors is an integer number (1508644152).

Almost surely, 2^12012221982 is an apocalyptic number.

12012221982 is an abundant number, since it is smaller than the sum of its proper divisors (12126084450).

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

12012221982 is a wasteful number, since it uses less digits than its factorization.

12012221982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9488543.

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 12012221982 in words is "twelve billion, twelve million, two hundred twenty-one thousand, nine hundred eighty-two".