21303203213 has 8 divisors (see below), whose sum is σ = 21883257600. Its totient is φ = 20723374800.

The previous prime is 21303203203. The next prime is 21303203231. The reversal of 21303203213 is 31230230312.

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 21303203213 - 2⁸ = 21303202957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303203203) 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, 144188 + ... + 251786.

It is an arithmetic number, because the mean of its divisors is an integer number (2735407200).

Almost surely, 2^21303203213 is an apocalyptic number.

It is an amenable number.

21303203213 is a deficient number, since it is larger than the sum of its proper divisors (580054387).

21303203213 is a wasteful number, since it uses less digits than its factorization.

21303203213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112987.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21303203213 its reverse (31230230312), we get a palindrome (52533433525).

The spelling of 21303203213 in words is "twenty-one billion, three hundred three million, two hundred three thousand, two hundred thirteen".