21113013441 has 8 divisors (see below), whose sum is σ = 30316121920. Its totient is φ = 12992623632.

The previous prime is 21113013413. The next prime is 21113013547. The reversal of 21113013441 is 14431031112.

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

It is not a de Polignac number, because 21113013441 - 2⁶ = 21113013377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113013241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270679621 + ... + 270679698.

It is an arithmetic number, because the mean of its divisors is an integer number (3789515240).

Almost surely, 2^21113013441 is an apocalyptic number.

It is an amenable number.

21113013441 is a deficient number, since it is larger than the sum of its proper divisors (9203108479).

21113013441 is a wasteful number, since it uses less digits than its factorization.

21113013441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541359335.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21113013441 its reverse (14431031112), we get a palindrome (35544044553).

The spelling of 21113013441 in words is "twenty-one billion, one hundred thirteen million, thirteen thousand, four hundred forty-one".