1228744612169 has 2 divisors, whose sum is σ = 1228744612170. Its totient is φ = 1228744612168.

The previous prime is 1228744612091. The next prime is 1228744612217. The reversal of 1228744612169 is 9612164478221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1205856553225 + 22888058944 = 1098115^2 + 151288^2 .

It is an emirp because it is prime and its reverse (9612164478221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228744612169 - 2¹² = 1228744608073 is a prime.

It is a super-2 number, since 2×1228744612169² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1228744612169.

It is not a weakly prime, because it can be changed into another prime (1228744612369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614372306084 + 614372306085.

It is an arithmetic number, because the mean of its divisors is an integer number (614372306085).

Almost surely, 2^{1228744612169} is an apocalyptic number.

It is an amenable number.

1228744612169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228744612169 is an equidigital number, since it uses as much as digits as its factorization.

1228744612169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2322432, while the sum is 53.

The spelling of 1228744612169 in words is "one trillion, two hundred twenty-eight billion, seven hundred forty-four million, six hundred twelve thousand, one hundred sixty-nine".