21030310200947 has 2 divisors, whose sum is σ = 21030310200948. Its totient is φ = 21030310200946.

The previous prime is 21030310200917. The next prime is 21030310201097. The reversal of 21030310200947 is 74900201303012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21030310200947 - 2³⁰ = 21029236459123 is a prime.

It is not a weakly prime, because it can be changed into another prime (21030310200917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515155100473 + 10515155100474.

It is an arithmetic number, because the mean of its divisors is an integer number (10515155100474).

Almost surely, 2^{21030310200947} is an apocalyptic number.

21030310200947 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030310200947 is an equidigital number, since it uses as much as digits as its factorization.

21030310200947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

Adding to 21030310200947 its reverse (74900201303012), we get a palindrome (95930511503959).

The spelling of 21030310200947 in words is "twenty-one trillion, thirty billion, three hundred ten million, two hundred thousand, nine hundred forty-seven".