21124242034313 has 8 divisors (see below), whose sum is σ = 23479431970176. Its totient is φ = 18841519481200.

The previous prime is 21124242034309. The next prime is 21124242034333. The reversal of 21124242034313 is 31343024242112.

It is a happy number.

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 21124242034313 - 2² = 21124242034309 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 21124242034313.

It is not an unprimeable number, because it can be changed into a prime (21124242034333) 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, 18116845073 + ... + 18116846238.

It is an arithmetic number, because the mean of its divisors is an integer number (2934928996272).

Almost surely, 2^{21124242034313} is an apocalyptic number.

It is an amenable number.

21124242034313 is a deficient number, since it is larger than the sum of its proper divisors (2355189935863).

21124242034313 is a wasteful number, since it uses less digits than its factorization.

21124242034313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36233691375.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21124242034313 its reverse (31343024242112), we get a palindrome (52467266276425).

The spelling of 21124242034313 in words is "twenty-one trillion, one hundred twenty-four billion, two hundred forty-two million, thirty-four thousand, three hundred thirteen".