10531198109 has 2 divisors, whose sum is σ = 10531198110. Its totient is φ = 10531198108.

The previous prime is 10531198099. The next prime is 10531198121. The reversal of 10531198109 is 90189113501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6530256100 + 4000942009 = 80810^2 + 63253^2 .

It is a cyclic number.

It is not a de Polignac number, because 10531198109 - 2¹² = 10531194013 is a prime.

It is a super-2 number, since 2×10531198109² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10531198169) 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, 5265599054 + 5265599055.

It is an arithmetic number, because the mean of its divisors is an integer number (5265599055).

Almost surely, 2^10531198109 is an apocalyptic number.

It is an amenable number.

10531198109 is a deficient number, since it is larger than the sum of its proper divisors (1).

10531198109 is an equidigital number, since it uses as much as digits as its factorization.

10531198109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 38.

The spelling of 10531198109 in words is "ten billion, five hundred thirty-one million, one hundred ninety-eight thousand, one hundred nine".