12216270513455 has 4 divisors (see below), whose sum is σ = 14659524616152. Its totient is φ = 9773016410760.

The previous prime is 12216270513443. The next prime is 12216270513457. The reversal of 12216270513455 is 55431507261221.

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

It is not a de Polignac number, because 12216270513455 - 2²⁸ = 12216002077999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216270513457) 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, 1221627051341 + ... + 1221627051350.

It is an arithmetic number, because the mean of its divisors is an integer number (3664881154038).

Almost surely, 2^{12216270513455} is an apocalyptic number.

12216270513455 is a deficient number, since it is larger than the sum of its proper divisors (2443254102697).

12216270513455 is an equidigital number, since it uses as much as digits as its factorization.

12216270513455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443254102696.

The product of its (nonzero) digits is 504000, while the sum is 44.

Adding to 12216270513455 its reverse (55431507261221), we get a palindrome (67647777774676).

The spelling of 12216270513455 in words is "twelve trillion, two hundred sixteen billion, two hundred seventy million, five hundred thirteen thousand, four hundred fifty-five".