21013243241 has 8 divisors (see below), whose sum is σ = 21583202304. Its totient is φ = 20443391280.

The previous prime is 21013243189. The next prime is 21013243271. The reversal of 21013243241 is 14234231012.

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 21013243241 - 2²² = 21009048937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21013243271) 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, 520406 + ... + 559328.

It is an arithmetic number, because the mean of its divisors is an integer number (2697900288).

Almost surely, 2^21013243241 is an apocalyptic number.

It is an amenable number.

21013243241 is a deficient number, since it is larger than the sum of its proper divisors (569959063).

21013243241 is a wasteful number, since it uses less digits than its factorization.

21013243241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53551.

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

Adding to 21013243241 its reverse (14234231012), we get a palindrome (35247474253).

The spelling of 21013243241 in words is "twenty-one billion, thirteen million, two hundred forty-three thousand, two hundred forty-one".