11170212509 has 2 divisors, whose sum is σ = 11170212510. Its totient is φ = 11170212508.

The previous prime is 11170212451. The next prime is 11170212523. The reversal of 11170212509 is 90521207111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10460789284 + 709423225 = 102278^2 + 26635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11170212509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11170212709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5585106254 + 5585106255.

It is an arithmetic number, because the mean of its divisors is an integer number (5585106255).

Almost surely, 2^11170212509 is an apocalyptic number.

It is an amenable number.

11170212509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11170212509 is an equidigital number, since it uses as much as digits as its factorization.

11170212509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 29.

The spelling of 11170212509 in words is "eleven billion, one hundred seventy million, two hundred twelve thousand, five hundred nine".