12211118415 has 16 divisors (see below), whose sum is σ = 21708655200. Its totient is φ = 6512596416.

The previous prime is 12211118351. The next prime is 12211118419. The reversal of 12211118415 is 51481111221.

12211118415 is a `hidden beast` number, since 1 + 221 + 11 + 18 + 415 = 666.

It is not a de Polignac number, because 12211118415 - 2⁶ = 12211118351 is a prime.

It is a super-2 number, since 2×12211118415² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211118419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45226230 + ... + 45226499.

It is an arithmetic number, because the mean of its divisors is an integer number (1356790950).

Almost surely, 2^12211118415 is an apocalyptic number.

12211118415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12211118415 is a deficient number, since it is larger than the sum of its proper divisors (9497536785).

12211118415 is an equidigital number, since it uses as much as digits as its factorization.

12211118415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90452743 (or 90452737 counting only the distinct ones).

The product of its digits is 640, while the sum is 27.

Adding to 12211118415 its reverse (51481111221), we get a palindrome (63692229636).

The spelling of 12211118415 in words is "twelve billion, two hundred eleven million, one hundred eighteen thousand, four hundred fifteen".