11231112211515 has 80 divisors (see below), whose sum is σ = 23150084060928. Its totient is φ = 5102724216384.

The previous prime is 11231112211511. The next prime is 11231112211591. The reversal of 11231112211515 is 51511221113211.

It is a happy number.

11231112211515 is a `hidden beast` number, since 1 + 1 + 2 + 3 + 11 + 122 + 11 + 515 = 666.

It is not a de Polignac number, because 11231112211515 - 2² = 11231112211511 is a prime.

It is a super-2 number, since 2×11231112211515² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11231112211511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11690017 + ... + 12614226.

Almost surely, 2^{11231112211515} is an apocalyptic number.

11231112211515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11231112211515 is an abundant number, since it is smaller than the sum of its proper divisors (11918971849413).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231112211515 is a wasteful number, since it uses less digits than its factorization.

11231112211515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24304430 (or 24304421 counting only the distinct ones).

The product of its digits is 600, while the sum is 27.

Adding to 11231112211515 its reverse (51511221113211), we get a palindrome (62742333324726).

The spelling of 11231112211515 in words is "eleven trillion, two hundred thirty-one billion, one hundred twelve million, two hundred eleven thousand, five hundred fifteen".