12021056562 has 32 divisors (see below), whose sum is σ = 24298916544. Its totient is φ = 3964280000.

The previous prime is 12021056557. The next prime is 12021056569. The reversal of 12021056562 is 26565012021.

It is not an unprimeable number, because it can be changed into a prime (12021056569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 857812 + ... + 871712.

It is an arithmetic number, because the mean of its divisors is an integer number (759341142).

Almost surely, 2^12021056562 is an apocalyptic number.

12021056562 is an abundant number, since it is smaller than the sum of its proper divisors (12277859982).

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

12021056562 is a wasteful number, since it uses less digits than its factorization.

12021056562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15434.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 12021056562 its reverse (26565012021), we get a palindrome (38586068583).

The spelling of 12021056562 in words is "twelve billion, twenty-one million, fifty-six thousand, five hundred sixty-two".