12217280087 has 4 divisors (see below), whose sum is σ = 12217787400. Its totient is φ = 12216772776.

The previous prime is 12217280071. The next prime is 12217280111. The reversal of 12217280087 is 78008271221.

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

It is a cyclic number.

It is not a de Polignac number, because 12217280087 - 2⁴ = 12217280071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12217280087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12217280287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215633 + ... + 266330.

It is an arithmetic number, because the mean of its divisors is an integer number (3054446850).

Almost surely, 2^12217280087 is an apocalyptic number.

12217280087 is a deficient number, since it is larger than the sum of its proper divisors (507313).

12217280087 is an equidigital number, since it uses as much as digits as its factorization.

12217280087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507312.

The product of its (nonzero) digits is 25088, while the sum is 38.

The spelling of 12217280087 in words is "twelve billion, two hundred seventeen million, two hundred eighty thousand, eighty-seven".