21300277331 has 2 divisors, whose sum is σ = 21300277332. Its totient is φ = 21300277330.

The previous prime is 21300277259. The next prime is 21300277379. The reversal of 21300277331 is 13377200312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21300277331 - 2²² = 21296083027 is a prime.

It is a super-2 number, since 2×21300277331² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21300277294 and 21300277303.

It is not a weakly prime, because it can be changed into another prime (21300277631) 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, 10650138665 + 10650138666.

It is an arithmetic number, because the mean of its divisors is an integer number (10650138666).

Almost surely, 2^21300277331 is an apocalyptic number.

21300277331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300277331 is an equidigital number, since it uses as much as digits as its factorization.

21300277331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 29.

Adding to 21300277331 its reverse (13377200312), we get a palindrome (34677477643).

The spelling of 21300277331 in words is "twenty-one billion, three hundred million, two hundred seventy-seven thousand, three hundred thirty-one".