21202341012243 has 24 divisors (see below), whose sum is σ = 31211676328976. Its totient is φ = 13866149721600.

The previous prime is 21202341012239. The next prime is 21202341012263. The reversal of 21202341012243 is 34221014320212.

21202341012243 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 2 + 3 + 410 + 1 + 2 + 243 = 666.

It is not a de Polignac number, because 21202341012243 - 2² = 21202341012239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202341012263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72803698 + ... + 73094343.

Almost surely, 2^{21202341012243} is an apocalyptic number.

21202341012243 is a deficient number, since it is larger than the sum of its proper divisors (10009335316733).

21202341012243 is a wasteful number, since it uses less digits than its factorization.

21202341012243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145898355 (or 145898352 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21202341012243 its reverse (34221014320212), we get a palindrome (55423355332455).

The spelling of 21202341012243 in words is "twenty-one trillion, two hundred two billion, three hundred forty-one million, twelve thousand, two hundred forty-three".