11205012515 has 16 divisors (see below), whose sum is σ = 13560545280. Its totient is φ = 8887747680.

The previous prime is 11205012503. The next prime is 11205012529. The reversal of 11205012515 is 51521050211.

It is not a de Polignac number, because 11205012515 - 2²⁸ = 10936577059 is a prime.

It is a super-2 number, since 2×11205012515² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188470 + ... + 1197860.

It is an arithmetic number, because the mean of its divisors is an integer number (847534080).

Almost surely, 2^11205012515 is an apocalyptic number.

11205012515 is a deficient number, since it is larger than the sum of its proper divisors (2355532765).

11205012515 is a wasteful number, since it uses less digits than its factorization.

11205012515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11402.

The product of its (nonzero) digits is 500, while the sum is 23.

Adding to 11205012515 its reverse (51521050211), we get a palindrome (62726062726).

The spelling of 11205012515 in words is "eleven billion, two hundred five million, twelve thousand, five hundred fifteen".