21321100301 has 2 divisors, whose sum is σ = 21321100302. Its totient is φ = 21321100300.

The previous prime is 21321100267. The next prime is 21321100331. The reversal of 21321100301 is 10300112312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18313126276 + 3007974025 = 135326^2 + 54845^2 .

It is a cyclic number.

It is not a de Polignac number, because 21321100301 - 2¹⁰ = 21321099277 is a prime.

It is a super-3 number, since 3×21321100301³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21321100331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660550150 + 10660550151.

It is an arithmetic number, because the mean of its divisors is an integer number (10660550151).

Almost surely, 2^21321100301 is an apocalyptic number.

It is an amenable number.

21321100301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321100301 is an equidigital number, since it uses as much as digits as its factorization.

21321100301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21321100301 its reverse (10300112312), we get a palindrome (31621212613).

The spelling of 21321100301 in words is "twenty-one billion, three hundred twenty-one million, one hundred thousand, three hundred one".