12820227555117 has 8 divisors (see below), whose sum is σ = 17093674360096. Its totient is φ = 8546799560112.

The previous prime is 12820227555061. The next prime is 12820227555193. The reversal of 12820227555117 is 71155572202821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12820227555117 is a prime.

It is a super-3 number, since 3×12820227555117³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820227555517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3026878 + ... + 5899359.

It is an arithmetic number, because the mean of its divisors is an integer number (2136709295012).

Almost surely, 2^{12820227555117} is an apocalyptic number.

It is an amenable number.

12820227555117 is a deficient number, since it is larger than the sum of its proper divisors (4273446804979).

12820227555117 is an equidigital number, since it uses as much as digits as its factorization.

12820227555117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9404987.

The product of its (nonzero) digits is 784000, while the sum is 48.

Adding to 12820227555117 its reverse (71155572202821), we get a palindrome (83975799757938).

The spelling of 12820227555117 in words is "twelve trillion, eight hundred twenty billion, two hundred twenty-seven million, five hundred fifty-five thousand, one hundred seventeen".