21444140241 has 12 divisors (see below), whose sum is σ = 31633909632. Its totient is φ = 13991921016.

The previous prime is 21444140213. The next prime is 21444140269. The reversal of 21444140241 is 14204144412.

It is a happy number.

21444140241 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 414 + 0 + 241 = 666.

It is an interprime number because it is at equal distance from previous prime (21444140213) and next prime (21444140269).

It is not a de Polignac number, because 21444140241 - 2¹⁵ = 21444107473 is a prime.

It is a super-3 number, since 3×21444140241³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21444140281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25347261 + ... + 25348106.

It is an arithmetic number, because the mean of its divisors is an integer number (2636159136).

Almost surely, 2^21444140241 is an apocalyptic number.

It is an amenable number.

21444140241 is a deficient number, since it is larger than the sum of its proper divisors (10189769391).

21444140241 is a wasteful number, since it uses less digits than its factorization.

21444140241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50695420 (or 50695417 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 21444140241 its reverse (14204144412), we get a palindrome (35648284653).

The spelling of 21444140241 in words is "twenty-one billion, four hundred forty-four million, one hundred forty thousand, two hundred forty-one".