1378323217241 has 2 divisors, whose sum is σ = 1378323217242. Its totient is φ = 1378323217240.

The previous prime is 1378323217231. The next prime is 1378323217289. The reversal of 1378323217241 is 1427123238731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1307352126025 + 70971091216 = 1143395^2 + 266404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1378323217241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1378323217192 and 1378323217201.

It is not a weakly prime, because it can be changed into another prime (1378323217231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689161608620 + 689161608621.

It is an arithmetic number, because the mean of its divisors is an integer number (689161608621).

Almost surely, 2^{1378323217241} is an apocalyptic number.

It is an amenable number.

1378323217241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378323217241 is an equidigital number, since it uses as much as digits as its factorization.

1378323217241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The spelling of 1378323217241 in words is "one trillion, three hundred seventy-eight billion, three hundred twenty-three million, two hundred seventeen thousand, two hundred forty-one".