21130320007 has 2 divisors, whose sum is σ = 21130320008. Its totient is φ = 21130320006.

The previous prime is 21130319953. The next prime is 21130320061. The reversal of 21130320007 is 70002303112.

It is a balanced prime because it is at equal distance from previous prime (21130319953) and next prime (21130320061).

It is a cyclic number.

It is not a de Polignac number, because 21130320007 - 2²⁷ = 20996102279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130420007) 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, 10565160003 + 10565160004.

It is an arithmetic number, because the mean of its divisors is an integer number (10565160004).

Almost surely, 2^21130320007 is an apocalyptic number.

21130320007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130320007 is an equidigital number, since it uses as much as digits as its factorization.

21130320007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 19.

Adding to 21130320007 its reverse (70002303112), we get a palindrome (91132623119).

The spelling of 21130320007 in words is "twenty-one billion, one hundred thirty million, three hundred twenty thousand, seven".