21611241737243 has 8 divisors (see below), whose sum is σ = 21620129581296. Its totient is φ = 21602354831200.

The previous prime is 21611241737237. The next prime is 21611241737297. The reversal of 21611241737243 is 34273714211612.

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 21611241737243 - 2²⁸ = 21610973301787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21611241737194 and 21611241737203.

It is not an unprimeable number, because it can be changed into a prime (21611241737443) 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, 47871605 + ... + 48320937.

It is an arithmetic number, because the mean of its divisors is an integer number (2702516197662).

Almost surely, 2^{21611241737243} is an apocalyptic number.

21611241737243 is a deficient number, since it is larger than the sum of its proper divisors (8887844053).

21611241737243 is a wasteful number, since it uses less digits than its factorization.

21611241737243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469005.

The product of its digits is 338688, while the sum is 44.

Adding to 21611241737243 its reverse (34273714211612), we get a palindrome (55884955948855).

The spelling of 21611241737243 in words is "twenty-one trillion, six hundred eleven billion, two hundred forty-one million, seven hundred thirty-seven thousand, two hundred forty-three".