21013440033041 has 4 divisors (see below), whose sum is σ = 21013497062400. Its totient is φ = 21013383003684.

The previous prime is 21013440033037. The next prime is 21013440033163. The reversal of 21013440033041 is 14033004431012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21013440033041 - 2² = 21013440033037 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 21013440033041.

It is not an unprimeable number, because it can be changed into a prime (21013440033241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27958361 + ... + 28700118.

It is an arithmetic number, because the mean of its divisors is an integer number (5253374265600).

Almost surely, 2^{21013440033041} is an apocalyptic number.

It is an amenable number.

21013440033041 is a deficient number, since it is larger than the sum of its proper divisors (57029359).

21013440033041 is an equidigital number, since it uses as much as digits as its factorization.

21013440033041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57029358.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21013440033041 its reverse (14033004431012), we get a palindrome (35046444464053).

The spelling of 21013440033041 in words is "twenty-one trillion, thirteen billion, four hundred forty million, thirty-three thousand, forty-one".