21044133040111 has 4 divisors (see below), whose sum is σ = 21050748614824. Its totient is φ = 21037517465400.

The previous prime is 21044133040081. The next prime is 21044133040159. The reversal of 21044133040111 is 11104033144012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21044133040111 - 2⁵ = 21044133040079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044133040211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3307782585 + ... + 3307788946.

It is an arithmetic number, because the mean of its divisors is an integer number (5262687153706).

Almost surely, 2^{21044133040111} is an apocalyptic number.

21044133040111 is a deficient number, since it is larger than the sum of its proper divisors (6615574713).

21044133040111 is an equidigital number, since it uses as much as digits as its factorization.

21044133040111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615574712.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21044133040111 its reverse (11104033144012), we get a palindrome (32148166184123).

The spelling of 21044133040111 in words is "twenty-one trillion, forty-four billion, one hundred thirty-three million, forty thousand, one hundred eleven".