111321131 has 8 divisors (see below), whose sum is σ = 113679984. Its totient is φ = 108984960.

The previous prime is 111321121. The next prime is 111321137. The reversal of 111321131 is 131123111.

It is a happy number.

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 111321131 - 2¹⁴ = 111304747 is a prime.

It is a super-2 number, since 2×111321131² = 24784788414238322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111321137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4436 + ... + 15566.

It is an arithmetic number, because the mean of its divisors is an integer number (14209998).

Almost surely, 2^111321131 is an apocalyptic number.

111321131 is a deficient number, since it is larger than the sum of its proper divisors (2358853).

111321131 is a wasteful number, since it uses less digits than its factorization.

111321131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11341.

The product of its digits is 18, while the sum is 14.

The square root of 111321131 is about 10550.8829488342. The cubic root of 111321131 is about 481.0525672180.

Adding to 111321131 its reverse (131123111), we get a palindrome (242444242).

The spelling of 111321131 in words is "one hundred eleven million, three hundred twenty-one thousand, one hundred thirty-one".