111121331131 has 4 divisors (see below), whose sum is σ = 114953101200. Its totient is φ = 107289561064.

The previous prime is 111121331089. The next prime is 111121331173. The reversal of 111121331131 is 131133121111.

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

It is an interprime number because it is at equal distance from previous prime (111121331089) and next prime (111121331173).

It is a cyclic number.

It is not a de Polignac number, because 111121331131 - 2¹¹ = 111121329083 is a prime.

It is a super-2 number, since 2×111121331131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121331099 and 111121331108.

It is not an unprimeable number, because it can be changed into a prime (111121338131) 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, 1915884991 + ... + 1915885048.

It is an arithmetic number, because the mean of its divisors is an integer number (28738275300).

Almost surely, 2^111121331131 is an apocalyptic number.

111121331131 is a deficient number, since it is larger than the sum of its proper divisors (3831770069).

111121331131 is an equidigital number, since it uses as much as digits as its factorization.

111121331131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831770068.

The product of its digits is 54, while the sum is 19.

Adding to 111121331131 its reverse (131133121111), we get a palindrome (242254452242).

The spelling of 111121331131 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred thirty-one thousand, one hundred thirty-one".