21113031041 has 8 divisors (see below), whose sum is σ = 21149904168. Its totient is φ = 21076192000.

The previous prime is 21113030959. The next prime is 21113031077. The reversal of 21113031041 is 14013031112.

It can be written as a sum of positive squares in 4 ways, for example, as 185068816 + 20927962225 = 13604^2 + 144665^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113031041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21113031241) 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, 1436711 + ... + 1451331.

It is an arithmetic number, because the mean of its divisors is an integer number (2643738021).

Almost surely, 2^21113031041 is an apocalyptic number.

It is an amenable number.

21113031041 is a deficient number, since it is larger than the sum of its proper divisors (36873127).

21113031041 is a wasteful number, since it uses less digits than its factorization.

21113031041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17043.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21113031041 its reverse (14013031112), we get a palindrome (35126062153).

The spelling of 21113031041 in words is "twenty-one billion, one hundred thirteen million, thirty-one thousand, forty-one".