111361696681 has 9 divisors (see below), whose sum is σ = 111828497949. Its totient is φ = 110896840044.

The previous prime is 111361696619. The next prime is 111361696709. The reversal of 111361696681 is 186696163111.

The square root of 111361696681 is 333709.

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

It is not a de Polignac number, because 111361696681 - 2³³ = 102771762089 is a prime.

It is a super-2 number, since 2×111361696681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111361690681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 102448120 + ... + 102449206.

It is an arithmetic number, because the mean of its divisors is an integer number (12425388661).

Almost surely, 2^111361696681 is an apocalyptic number.

111361696681 is the 333709-th square number.

111361696681 is the 166855-th centered octagonal number.

It is an amenable number.

111361696681 is a deficient number, since it is larger than the sum of its proper divisors (466801268).

111361696681 is an frugal number, since it uses more digits than its factorization.

111361696681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788 (or 1394 counting only the distinct ones).

The product of its digits is 279936, while the sum is 49.

Multiplying 111361696681 by its sum of digits (49), we get a square (5456723137369 = 2335963²).

The spelling of 111361696681 in words is "one hundred eleven billion, three hundred sixty-one million, six hundred ninety-six thousand, six hundred eighty-one".