1227881317345 has 8 divisors (see below), whose sum is σ = 1560131556264. Its totient is φ = 924522403584.

The previous prime is 1227881317319. The next prime is 1227881317357. The reversal of 1227881317345 is 5437131887221.

It can be written as a sum of positive squares in 4 ways, for example, as 9091813201 + 1218789504144 = 95351^2 + 1103988^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1227881317345 - 2⁹ = 1227881316833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1227881317292 and 1227881317301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7222831194 + ... + 7222831363.

It is an arithmetic number, because the mean of its divisors is an integer number (195016444533).

Almost surely, 2^{1227881317345} is an apocalyptic number.

It is an amenable number.

1227881317345 is a deficient number, since it is larger than the sum of its proper divisors (332250238919).

1227881317345 is a wasteful number, since it uses less digits than its factorization.

1227881317345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14445662579.

The product of its digits is 2257920, while the sum is 52.

The spelling of 1227881317345 in words is "one trillion, two hundred twenty-seven billion, eight hundred eighty-one million, three hundred seventeen thousand, three hundred forty-five".