111252983808409 has 3 divisors (see below), whose sum is σ = 111252994356063. Its totient is φ = 111252973260756.

The previous prime is 111252983808403. The next prime is 111252983808427. The reversal of 111252983808409 is 904808389252111.

The square root of 111252983808409 is 10547653.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 99160867782025 + 12092116026384 = 9957955^2 + 3477372^2 .

It is not a de Polignac number, because 111252983808409 - 2³⁵ = 111218624070041 is a prime.

It is a super-2 number, since 2×111252983808409² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111252983808403) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5273827 + ... + 15821479.

It is an arithmetic number, because the mean of its divisors is an integer number (37084331452021).

Almost surely, 2^{111252983808409} is an apocalyptic number.

111252983808409 is the 10547653-rd square number.

111252983808409 is the 5273827-th centered octagonal number.

It is an amenable number.

111252983808409 is a deficient number, since it is larger than the sum of its proper divisors (10547654).

111252983808409 is an frugal number, since it uses more digits than its factorization.

111252983808409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21095306 (or 10547653 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 61.

The spelling of 111252983808409 in words is "one hundred eleven trillion, two hundred fifty-two billion, nine hundred eighty-three million, eight hundred eight thousand, four hundred nine".