21441545105011 has 16 divisors (see below), whose sum is σ = 21947133957120. Its totient is φ = 20940986304000.

The previous prime is 21441545104997. The next prime is 21441545105039. The reversal of 21441545105011 is 11050154514412.

It is a cyclic number.

It is not a de Polignac number, because 21441545105011 - 2³¹ = 21439397621363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21441545165011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7297986 + ... + 9805288.

It is an arithmetic number, because the mean of its divisors is an integer number (1371695872320).

Almost surely, 2^{21441545105011} is an apocalyptic number.

21441545105011 is a deficient number, since it is larger than the sum of its proper divisors (505588852109).

21441545105011 is a wasteful number, since it uses less digits than its factorization.

21441545105011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508306.

The product of its (nonzero) digits is 16000, while the sum is 34.

Adding to 21441545105011 its reverse (11050154514412), we get a palindrome (32491699619423).

The spelling of 21441545105011 in words is "twenty-one trillion, four hundred forty-one billion, five hundred forty-five million, one hundred five thousand, eleven".