21300000101 has 2 divisors, whose sum is σ = 21300000102. Its totient is φ = 21300000100.

The previous prime is 21300000091. The next prime is 21300000119. The reversal of 21300000101 is 10100000312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16350736900 + 4949263201 = 127870^2 + 70351^2 .

It is a cyclic number.

It is not a de Polignac number, because 21300000101 - 2²⁶ = 21232891237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21300000181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650000050 + 10650000051.

It is an arithmetic number, because the mean of its divisors is an integer number (10650000051).

Almost surely, 2^21300000101 is an apocalyptic number.

It is an amenable number.

21300000101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300000101 is an equidigital number, since it uses as much as digits as its factorization.

21300000101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 21300000101 its reverse (10100000312), we get a palindrome (31400000413).

The spelling of 21300000101 in words is "twenty-one billion, three hundred million, one hundred one", and thus it is an aban number.