11500001213 has 2 divisors, whose sum is σ = 11500001214. Its totient is φ = 11500001212.

The previous prime is 11500001179. The next prime is 11500001281. The reversal of 11500001213 is 31210000511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11487981124 + 12020089 = 107182^2 + 3467^2 .

It is a cyclic number.

It is not a de Polignac number, because 11500001213 - 2²⁰ = 11498952637 is a prime.

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 (11500001113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5750000606 + 5750000607.

It is an arithmetic number, because the mean of its divisors is an integer number (5750000607).

Almost surely, 2^11500001213 is an apocalyptic number.

It is an amenable number.

11500001213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11500001213 is an equidigital number, since it uses as much as digits as its factorization.

11500001213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 14.

Adding to 11500001213 its reverse (31210000511), we get a palindrome (42710001724).

The spelling of 11500001213 in words is "eleven billion, five hundred million, one thousand, two hundred thirteen".