21331242302 has 4 divisors (see below), whose sum is σ = 31996863456. Its totient is φ = 10665621150.

The previous prime is 21331242301. The next prime is 21331242311. The reversal of 21331242302 is 20324213312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331242301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332810574 + ... + 5332810577.

It is an arithmetic number, because the mean of its divisors is an integer number (7999215864).

Almost surely, 2^21331242302 is an apocalyptic number.

21331242302 is a deficient number, since it is larger than the sum of its proper divisors (10665621154).

21331242302 is a wasteful number, since it uses less digits than its factorization.

21331242302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665621153.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21331242302 its reverse (20324213312), we get a palindrome (41655455614).

The spelling of 21331242302 in words is "twenty-one billion, three hundred thirty-one million, two hundred forty-two thousand, three hundred two".