11215117 has 2 divisors, whose sum is σ = 11215118. Its totient is φ = 11215116.

The previous prime is 11215097. The next prime is 11215129. The reversal of 11215117 is 71151211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8561476 + 2653641 = 2926^2 + 1629^2 .

It is an emirp because it is prime and its reverse (71151211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11215117 - 2¹⁵ = 11182349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11215094 and 11215103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11215177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5607558 + 5607559.

It is an arithmetic number, because the mean of its divisors is an integer number (5607559).

Almost surely, 2^11215117 is an apocalyptic number.

It is an amenable number.

11215117 is a deficient number, since it is larger than the sum of its proper divisors (1).

11215117 is an equidigital number, since it uses as much as digits as its factorization.

11215117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70, while the sum is 19.

The square root of 11215117 is about 3348.8978784072. The cubic root of 11215117 is about 223.8384051895.

Adding to 11215117 its reverse (71151211), we get a palindrome (82366328).

The spelling of 11215117 in words is "eleven million, two hundred fifteen thousand, one hundred seventeen".