21243000241013 has 8 divisors (see below), whose sum is σ = 22765706487168. Its totient is φ = 19770218789904.

The previous prime is 21243000240989. The next prime is 21243000241019. The reversal of 21243000241013 is 31014200034212.

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 21243000241013 - 2⁶ = 21243000240949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21243000241013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21243000241019) 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, 12481197881 + ... + 12481199582.

It is an arithmetic number, because the mean of its divisors is an integer number (2845713310896).

Almost surely, 2^{21243000241013} is an apocalyptic number.

21243000241013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21243000241013 is a deficient number, since it is larger than the sum of its proper divisors (1522706246155).

21243000241013 is a wasteful number, since it uses less digits than its factorization.

21243000241013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24962397523.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21243000241013 its reverse (31014200034212), we get a palindrome (52257200275225).

The spelling of 21243000241013 in words is "twenty-one trillion, two hundred forty-three billion, two hundred forty-one thousand, thirteen".