111131362681 has 8 divisors (see below), whose sum is σ = 113846446728. Its totient is φ = 108416496000.

The previous prime is 111131362679. The next prime is 111131362697. The reversal of 111131362681 is 186263131111.

It can be written as a sum of positive squares in 4 ways, for example, as 497959225 + 110633403456 = 22315^2 + 332616^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111131362681 - 2¹ = 111131362679 is a prime.

It is a super-2 number, since 2×111131362681² (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 (111131362651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556751 + ... + 1626571.

It is an arithmetic number, because the mean of its divisors is an integer number (14230805841).

Almost surely, 2^111131362681 is an apocalyptic number.

It is an amenable number.

111131362681 is a deficient number, since it is larger than the sum of its proper divisors (2715084047).

111131362681 is an equidigital number, since it uses as much as digits as its factorization.

111131362681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108683.

The product of its digits is 5184, while the sum is 34.

Adding to 111131362681 its reverse (186263131111), we get a palindrome (297394493792).

The spelling of 111131362681 in words is "one hundred eleven billion, one hundred thirty-one million, three hundred sixty-two thousand, six hundred eighty-one".