12021464056 has 16 divisors (see below), whose sum is σ = 25760280240. Its totient is φ = 5152056000.

The previous prime is 12021464051. The next prime is 12021464069. The reversal of 12021464056 is 65046412021.

It is a happy number.

It is a super-2 number, since 2×12021464056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021464051) 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 3 ways as a sum of consecutive naturals, for example, 107334445 + ... + 107334556.

It is an arithmetic number, because the mean of its divisors is an integer number (1610017515).

Almost surely, 2^12021464056 is an apocalyptic number.

It is an amenable number.

12021464056 is an abundant number, since it is smaller than the sum of its proper divisors (13738816184).

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

12021464056 is a wasteful number, since it uses less digits than its factorization.

12021464056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214669014 (or 214669010 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 12021464056 its reverse (65046412021), we get a palindrome (77067876077).

The spelling of 12021464056 in words is "twelve billion, twenty-one million, four hundred sixty-four thousand, fifty-six".