21300221101 has 2 divisors, whose sum is σ = 21300221102. Its totient is φ = 21300221100.

The previous prime is 21300221081. The next prime is 21300221141. The reversal of 21300221101 is 10112200312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19429572100 + 1870649001 = 139390^2 + 43251^2 .

It is a cyclic number.

It is not a de Polignac number, because 21300221101 - 2¹³ = 21300212909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21300221141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650110550 + 10650110551.

It is an arithmetic number, because the mean of its divisors is an integer number (10650110551).

Almost surely, 2^21300221101 is an apocalyptic number.

It is an amenable number.

21300221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300221101 is an equidigital number, since it uses as much as digits as its factorization.

21300221101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21300221101 its reverse (10112200312), we get a palindrome (31412421413).

The spelling of 21300221101 in words is "twenty-one billion, three hundred million, two hundred twenty-one thousand, one hundred one".