21120656654433 has 16 divisors (see below), whose sum is σ = 32932319568896. Its totient is φ = 11788273481040.

The previous prime is 21120656654423. The next prime is 21120656654501. The reversal of 21120656654433 is 33445665602112.

It is not a de Polignac number, because 21120656654433 - 2⁶ = 21120656654369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120656654423) 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 15 ways as a sum of consecutive naturals, for example, 11694714853 + ... + 11694716658.

It is an arithmetic number, because the mean of its divisors is an integer number (2058269973056).

Almost surely, 2^{21120656654433} is an apocalyptic number.

It is an amenable number.

21120656654433 is a deficient number, since it is larger than the sum of its proper divisors (11811662914463).

21120656654433 is a wasteful number, since it uses less digits than its factorization.

21120656654433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23389431564.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 21120656654433 in words is "twenty-one trillion, one hundred twenty billion, six hundred fifty-six million, six hundred fifty-four thousand, four hundred thirty-three".