1217353502137 has 2 divisors, whose sum is σ = 1217353502138. Its totient is φ = 1217353502136.

The previous prime is 1217353502119. The next prime is 1217353502147. The reversal of 1217353502137 is 7312053537121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 711439953961 + 505913548176 = 843469^2 + 711276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217353502137 - 2⁷ = 1217353502009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1217353502137.

It is not a weakly prime, because it can be changed into another prime (1217353502147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608676751068 + 608676751069.

It is an arithmetic number, because the mean of its divisors is an integer number (608676751069).

Almost surely, 2^{1217353502137} is an apocalyptic number.

It is an amenable number.

1217353502137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217353502137 is an equidigital number, since it uses as much as digits as its factorization.

1217353502137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 40.

The spelling of 1217353502137 in words is "one trillion, two hundred seventeen billion, three hundred fifty-three million, five hundred two thousand, one hundred thirty-seven".