21201300101 has 2 divisors, whose sum is σ = 21201300102. Its totient is φ = 21201300100.

The previous prime is 21201300089. The next prime is 21201300149. The reversal of 21201300101 is 10100310212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17525788225 + 3675511876 = 132385^2 + 60626^2 .

It is a cyclic number.

It is not a de Polignac number, because 21201300101 - 2¹⁴ = 21201283717 is a prime.

It is a super-2 number, since 2×21201300101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201360101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600650050 + 10600650051.

It is an arithmetic number, because the mean of its divisors is an integer number (10600650051).

Almost surely, 2^21201300101 is an apocalyptic number.

It is an amenable number.

21201300101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201300101 is an equidigital number, since it uses as much as digits as its factorization.

21201300101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21201300101 its reverse (10100310212), we get a palindrome (31301610313).

The spelling of 21201300101 in words is "twenty-one billion, two hundred one million, three hundred thousand, one hundred one".