1231204324417 has 2 divisors, whose sum is σ = 1231204324418. Its totient is φ = 1231204324416.

The previous prime is 1231204324411. The next prime is 1231204324463. The reversal of 1231204324417 is 7144234021321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 860221005361 + 370983319056 = 927481^2 + 609084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231204324417 - 2³ = 1231204324409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231204324411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615602162208 + 615602162209.

It is an arithmetic number, because the mean of its divisors is an integer number (615602162209).

Almost surely, 2^{1231204324417} is an apocalyptic number.

It is an amenable number.

1231204324417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231204324417 is an equidigital number, since it uses as much as digits as its factorization.

1231204324417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 34.

Adding to 1231204324417 its reverse (7144234021321), we get a palindrome (8375438345738).

The spelling of 1231204324417 in words is "one trillion, two hundred thirty-one billion, two hundred four million, three hundred twenty-four thousand, four hundred seventeen".