1112181615997 has 2 divisors, whose sum is σ = 1112181615998. Its totient is φ = 1112181615996.

The previous prime is 1112181615991. The next prime is 1112181616027. The reversal of 1112181615997 is 7995161812111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 983837836996 + 128343779001 = 991886^2 + 358251^2 .

It is an emirp because it is prime and its reverse (7995161812111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1112181615997 - 2¹⁵ = 1112181583229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112181615991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556090807998 + 556090807999.

It is an arithmetic number, because the mean of its divisors is an integer number (556090807999).

Almost surely, 2^{1112181615997} is an apocalyptic number.

It is an amenable number.

1112181615997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112181615997 is an equidigital number, since it uses as much as digits as its factorization.

1112181615997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 52.

The spelling of 1112181615997 in words is "one trillion, one hundred twelve billion, one hundred eighty-one million, six hundred fifteen thousand, nine hundred ninety-seven".