21000300001 has 2 divisors, whose sum is σ = 21000300002. Its totient is φ = 21000300000.

The previous prime is 21000299987. The next prime is 21000300007. The reversal of 21000300001 is 10000300012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15159519376 + 5840780625 = 123124^2 + 76425^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000300001 - 2²³ = 20991911393 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000300007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500150000 + 10500150001.

It is an arithmetic number, because the mean of its divisors is an integer number (10500150001).

Almost surely, 2^21000300001 is an apocalyptic number.

It is an amenable number.

21000300001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000300001 is an equidigital number, since it uses as much as digits as its factorization.

21000300001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 7.

Adding to 21000300001 its reverse (10000300012), we get a palindrome (31000600013).

The spelling of 21000300001 in words is "twenty-one billion, three hundred thousand, one".