21330440302241 has 12 divisors (see below), whose sum is σ = 24818812143300. Its totient is φ = 18278923299840.

The previous prime is 21330440302217. The next prime is 21330440302243. The reversal of 21330440302241 is 14220304403312.

It can be written as a sum of positive squares in 2 ways, for example, as 19586643462400 + 1743796839841 = 4425680^2 + 1320529^2 .

It is a de Polignac number, because none of the positive numbers 2^k-21330440302241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21330440302243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51114416 + ... + 51530033.

It is an arithmetic number, because the mean of its divisors is an integer number (2068234345275).

Almost surely, 2^{21330440302241} is an apocalyptic number.

It is an amenable number.

21330440302241 is a deficient number, since it is larger than the sum of its proper divisors (3488371841059).

21330440302241 is a wasteful number, since it uses less digits than its factorization.

21330440302241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102648704 (or 102648697 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21330440302241 its reverse (14220304403312), we get a palindrome (35550744705553).

The spelling of 21330440302241 in words is "twenty-one trillion, three hundred thirty billion, four hundred forty million, three hundred two thousand, two hundred forty-one".