1227479642117 has 4 divisors (see below), whose sum is σ = 1228872922956. Its totient is φ = 1226086361280.

The previous prime is 1227479642107. The next prime is 1227479642141. The reversal of 1227479642117 is 7112469747221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 191971917316 + 1035507724801 = 438146^2 + 1017599^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227479642117 - 2¹⁶ = 1227479576581 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 (1227479642107) 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, 696639098 + ... + 696640859.

It is an arithmetic number, because the mean of its divisors is an integer number (307218230739).

Almost surely, 2^{1227479642117} is an apocalyptic number.

It is an amenable number.

1227479642117 is a deficient number, since it is larger than the sum of its proper divisors (1393280839).

1227479642117 is an equidigital number, since it uses as much as digits as its factorization.

1227479642117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393280838.

The product of its digits is 2370816, while the sum is 53.

The spelling of 1227479642117 in words is "one trillion, two hundred twenty-seven billion, four hundred seventy-nine million, six hundred forty-two thousand, one hundred seventeen".