12021354434056 has 32 divisors (see below), whose sum is σ = 24590311714080. Its totient is φ = 5463990316800.

The previous prime is 12021354434029. The next prime is 12021354434113. The reversal of 12021354434056 is 65043445312021.

12021354434056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12021354434056² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417425 + ... + 5104096.

It is an arithmetic number, because the mean of its divisors is an integer number (768447241065).

Almost surely, 2^{12021354434056} is an apocalyptic number.

It is an amenable number.

12021354434056 is an abundant number, since it is smaller than the sum of its proper divisors (12568957280024).

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

12021354434056 is a wasteful number, since it uses less digits than its factorization.

12021354434056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6542485 (or 6542481 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 12021354434056 its reverse (65043445312021), we get a palindrome (77064799746077).

The spelling of 12021354434056 in words is "twelve trillion, twenty-one billion, three hundred fifty-four million, four hundred thirty-four thousand, fifty-six".