21010200331 has 2 divisors, whose sum is σ = 21010200332. Its totient is φ = 21010200330.

The previous prime is 21010200319. The next prime is 21010200349. The reversal of 21010200331 is 13300201012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010200331 - 2⁷ = 21010200203 is a prime.

It is a super-2 number, since 2×21010200331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21010204331) 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, 10505100165 + 10505100166.

It is an arithmetic number, because the mean of its divisors is an integer number (10505100166).

Almost surely, 2^21010200331 is an apocalyptic number.

21010200331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010200331 is an equidigital number, since it uses as much as digits as its factorization.

21010200331 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 21010200331 its reverse (13300201012), we get a palindrome (34310401343).

The spelling of 21010200331 in words is "twenty-one billion, ten million, two hundred thousand, three hundred thirty-one".