21041441121 has 8 divisors (see below), whose sum is σ = 28739529504. Its totient is φ = 13685490080.

The previous prime is 21041441117. The next prime is 21041441131. The reversal of 21041441121 is 12114414012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21041441121 - 2² = 21041441117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21041441101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85534191 + ... + 85534436.

It is an arithmetic number, because the mean of its divisors is an integer number (3592441188).

Almost surely, 2^21041441121 is an apocalyptic number.

It is an amenable number.

21041441121 is a deficient number, since it is larger than the sum of its proper divisors (7698088383).

21041441121 is a wasteful number, since it uses less digits than its factorization.

21041441121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171068671.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21041441121 its reverse (12114414012), we get a palindrome (33155855133).

The spelling of 21041441121 in words is "twenty-one billion, forty-one million, four hundred forty-one thousand, one hundred twenty-one".