11215129 has 2 divisors, whose sum is σ = 11215130. Its totient is φ = 11215128.

The previous prime is 11215117. The next prime is 11215177. The reversal of 11215129 is 92151211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7033104 + 4182025 = 2652^2 + 2045^2 .

It is an emirp because it is prime and its reverse (92151211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11215129 - 2⁵ = 11215097 is a prime.

It is not a weakly prime, because it can be changed into another prime (11215229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5607564 + 5607565.

It is an arithmetic number, because the mean of its divisors is an integer number (5607565).

Almost surely, 2^11215129 is an apocalyptic number.

It is an amenable number.

11215129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11215129 is an equidigital number, since it uses as much as digits as its factorization.

11215129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 22.

The square root of 11215129 is about 3348.8996700409. The cubic root of 11215129 is about 223.8384850240.

The spelling of 11215129 in words is "eleven million, two hundred fifteen thousand, one hundred twenty-nine".