1243216116497 has 4 divisors (see below), whose sum is σ = 1276816552116. Its totient is φ = 1209615680880.

The previous prime is 1243216116479. The next prime is 1243216116503. The reversal of 1243216116497 is 7946116123421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1112316152896 + 130899963601 = 1054664^2 + 361801^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243216116497 - 2¹⁰ = 1243216115473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243216116427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16800217754 + ... + 16800217827.

It is an arithmetic number, because the mean of its divisors is an integer number (319204138029).

Almost surely, 2^{1243216116497} is an apocalyptic number.

It is an amenable number.

1243216116497 is a deficient number, since it is larger than the sum of its proper divisors (33600435619).

1243216116497 is an equidigital number, since it uses as much as digits as its factorization.

1243216116497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33600435618.

The product of its digits is 435456, while the sum is 47.

The spelling of 1243216116497 in words is "one trillion, two hundred forty-three billion, two hundred sixteen million, one hundred sixteen thousand, four hundred ninety-seven".