21321110203107 has 48 divisors (see below), whose sum is σ = 33586590521088. Its totient is φ = 11926124346240.

The previous prime is 21321110203103. The next prime is 21321110203109. The reversal of 21321110203107 is 70130201112312.

It is not a de Polignac number, because 21321110203107 - 2² = 21321110203103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21321110203103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37771713 + ... + 38332029.

It is an arithmetic number, because the mean of its divisors is an integer number (699720635856).

Almost surely, 2^{21321110203107} is an apocalyptic number.

21321110203107 is a deficient number, since it is larger than the sum of its proper divisors (12265480317981).

21321110203107 is a wasteful number, since it uses less digits than its factorization.

21321110203107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567180 (or 567167 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

Adding to 21321110203107 its reverse (70130201112312), we get a palindrome (91451311315419).

The spelling of 21321110203107 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred ten million, two hundred three thousand, one hundred seven".