21041140241 has 6 divisors (see below), whose sum is σ = 23127865026. Its totient is φ = 19128309200.

The previous prime is 21041140199. The next prime is 21041140243. The reversal of 21041140241 is 14204114012.

It can be written as a sum of positive squares in only one way, i.e., 20717284225 + 323856016 = 143935^2 + 17996^2 .

It is not a de Polignac number, because 21041140241 - 2³⁰ = 19967398417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21041140243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86946740 + ... + 86946981.

It is an arithmetic number, because the mean of its divisors is an integer number (3854644171).

Almost surely, 2^21041140241 is an apocalyptic number.

It is an amenable number.

21041140241 is a deficient number, since it is larger than the sum of its proper divisors (2086724785).

21041140241 is a wasteful number, since it uses less digits than its factorization.

21041140241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173893743 (or 173893732 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21041140241 its reverse (14204114012), we get a palindrome (35245254253).

The spelling of 21041140241 in words is "twenty-one billion, forty-one million, one hundred forty thousand, two hundred forty-one".