21303243230242 has 8 divisors (see below), whose sum is σ = 31968480048336. Its totient is φ = 10647083214132.

The previous prime is 21303243230183. The next prime is 21303243230249. The reversal of 21303243230242 is 24203234230312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21303243230249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269194628 + ... + 2269204015.

It is an arithmetic number, because the mean of its divisors is an integer number (3996060006042).

Almost surely, 2^{21303243230242} is an apocalyptic number.

21303243230242 is a deficient number, since it is larger than the sum of its proper divisors (10665236818094).

21303243230242 is a wasteful number, since it uses less digits than its factorization.

21303243230242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538400992.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 21303243230242 its reverse (24203234230312), we get a palindrome (45506477460554).

The spelling of 21303243230242 in words is "twenty-one trillion, three hundred three billion, two hundred forty-three million, two hundred thirty thousand, two hundred forty-two".