11515405201 has 2 divisors, whose sum is σ = 11515405202. Its totient is φ = 11515405200.

The previous prime is 11515405199. The next prime is 11515405211. The reversal of 11515405201 is 10250451511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7202068225 + 4313336976 = 84865^2 + 65676^2 .

It is a cyclic number.

It is not a de Polignac number, because 11515405201 - 2¹ = 11515405199 is a prime.

Together with 11515405199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11515405211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757702600 + 5757702601.

It is an arithmetic number, because the mean of its divisors is an integer number (5757702601).

Almost surely, 2^11515405201 is an apocalyptic number.

It is an amenable number.

11515405201 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515405201 is an equidigital number, since it uses as much as digits as its factorization.

11515405201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 25.

Adding to 11515405201 its reverse (10250451511), we get a palindrome (21765856712).

The spelling of 11515405201 in words is "eleven billion, five hundred fifteen million, four hundred five thousand, two hundred one".