21130000745969 has 2 divisors, whose sum is σ = 21130000745970. Its totient is φ = 21130000745968.

The previous prime is 21130000745957. The next prime is 21130000745981. The reversal of 21130000745969 is 96954700003112.

It is a balanced prime because it is at equal distance from previous prime (21130000745957) and next prime (21130000745981).

It can be written as a sum of positive squares in only one way, i.e., 11671023698944 + 9458977047025 = 3416288^2 + 3075545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21130000745969 is a prime.

It is a super-2 number, since 2×21130000745969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21130000742969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565000372984 + 10565000372985.

It is an arithmetic number, because the mean of its divisors is an integer number (10565000372985).

Almost surely, 2^{21130000745969} is an apocalyptic number.

It is an amenable number.

21130000745969 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130000745969 is an equidigital number, since it uses as much as digits as its factorization.

21130000745969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 21130000745969 in words is "twenty-one trillion, one hundred thirty billion, seven hundred forty-five thousand, nine hundred sixty-nine".