21011322301 has 2 divisors, whose sum is σ = 21011322302. Its totient is φ = 21011322300.

The previous prime is 21011322239. The next prime is 21011322323. The reversal of 21011322301 is 10322311012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19663331076 + 1347991225 = 140226^2 + 36715^2 .

It is a cyclic number.

It is not a de Polignac number, because 21011322301 - 2¹⁹ = 21010798013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011322401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505661150 + 10505661151.

It is an arithmetic number, because the mean of its divisors is an integer number (10505661151).

Almost surely, 2^21011322301 is an apocalyptic number.

It is an amenable number.

21011322301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011322301 is an equidigital number, since it uses as much as digits as its factorization.

21011322301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21011322301 its reverse (10322311012), we get a palindrome (31333633313).

The spelling of 21011322301 in words is "twenty-one billion, eleven million, three hundred twenty-two thousand, three hundred one".