1213113231017 has 2 divisors, whose sum is σ = 1213113231018. Its totient is φ = 1213113231016.

The previous prime is 1213113230971. The next prime is 1213113231041. The reversal of 1213113231017 is 7101323113121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1009842098281 + 203271132736 = 1004909^2 + 450856^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213113231017 - 2¹² = 1213113226921 is a prime.

It is a super-2 number, since 2×1213113231017² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213113236017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606556615508 + 606556615509.

It is an arithmetic number, because the mean of its divisors is an integer number (606556615509).

Almost surely, 2^{1213113231017} is an apocalyptic number.

It is an amenable number.

1213113231017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213113231017 is an equidigital number, since it uses as much as digits as its factorization.

1213113231017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

Adding to 1213113231017 its reverse (7101323113121), we get a palindrome (8314436344138).

The spelling of 1213113231017 in words is "one trillion, two hundred thirteen billion, one hundred thirteen million, two hundred thirty-one thousand, seventeen".