11215015129 has 4 divisors (see below), whose sum is σ = 11518123684. Its totient is φ = 10911906576.

The previous prime is 11215015067. The next prime is 11215015139. The reversal of 11215015129 is 92151051211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4597518025 + 6617497104 = 67805^2 + 81348^2 .

It is a cyclic number.

It is not a de Polignac number, because 11215015129 - 2⁷ = 11215015001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11215015097 and 11215015106.

It is not an unprimeable number, because it can be changed into a prime (11215015139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151554222 + ... + 151554295.

It is an arithmetic number, because the mean of its divisors is an integer number (2879530921).

Almost surely, 2^11215015129 is an apocalyptic number.

It is an amenable number.

11215015129 is a deficient number, since it is larger than the sum of its proper divisors (303108555).

11215015129 is an equidigital number, since it uses as much as digits as its factorization.

11215015129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303108554.

The product of its (nonzero) digits is 900, while the sum is 28.

The spelling of 11215015129 in words is "eleven billion, two hundred fifteen million, fifteen thousand, one hundred twenty-nine".