21115335041 has 8 divisors (see below), whose sum is σ = 21407209824. Its totient is φ = 20824352640.

The previous prime is 21115334969. The next prime is 21115335049. The reversal of 21115335041 is 14053351112.

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 21115335041 - 2¹⁸ = 21115072897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21115335041.

It is not an unprimeable number, because it can be changed into a prime (21115335049) 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, 175376 + ... + 270161.

It is an arithmetic number, because the mean of its divisors is an integer number (2675901228).

Almost surely, 2^21115335041 is an apocalyptic number.

It is an amenable number.

21115335041 is a deficient number, since it is larger than the sum of its proper divisors (291874783).

21115335041 is an equidigital number, since it uses as much as digits as its factorization.

21115335041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446191.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 21115335041 its reverse (14053351112), we get a palindrome (35168686153).

The spelling of 21115335041 in words is "twenty-one billion, one hundred fifteen million, three hundred thirty-five thousand, forty-one".