21203130001 has 2 divisors, whose sum is σ = 21203130002. Its totient is φ = 21203130000.

The previous prime is 21203129989. The next prime is 21203130007. The reversal of 21203130001 is 10003130212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11638094400 + 9565035601 = 107880^2 + 97801^2 .

It is a cyclic number.

It is not a de Polignac number, because 21203130001 - 2²¹ = 21201032849 is a prime.

It is not a weakly prime, because it can be changed into another prime (21203130007) 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, 10601565000 + 10601565001.

It is an arithmetic number, because the mean of its divisors is an integer number (10601565001).

Almost surely, 2^21203130001 is an apocalyptic number.

It is an amenable number.

21203130001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203130001 is an equidigital number, since it uses as much as digits as its factorization.

21203130001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21203130001 its reverse (10003130212), we get a palindrome (31206260213).

The spelling of 21203130001 in words is "twenty-one billion, two hundred three million, one hundred thirty thousand, one".