21330302131 has 2 divisors, whose sum is σ = 21330302132. Its totient is φ = 21330302130.

The previous prime is 21330302057. The next prime is 21330302137. The reversal of 21330302131 is 13120303312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21330302131 - 2¹⁷ = 21330171059 is a prime.

It is a super-2 number, since 2×21330302131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21330302099 and 21330302108.

It is not a weakly prime, because it can be changed into another prime (21330302137) 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, 10665151065 + 10665151066.

It is an arithmetic number, because the mean of its divisors is an integer number (10665151066).

Almost surely, 2^21330302131 is an apocalyptic number.

21330302131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330302131 is an equidigital number, since it uses as much as digits as its factorization.

21330302131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21330302131 its reverse (13120303312), we get a palindrome (34450605443).

The spelling of 21330302131 in words is "twenty-one billion, three hundred thirty million, three hundred two thousand, one hundred thirty-one".