111331001 has 4 divisors (see below), whose sum is σ = 111462372. Its totient is φ = 111199632.

The previous prime is 111330997. The next prime is 111331037. The reversal of 111331001 is 100133111.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64818601 + 46512400 = 8051^2 + 6820^2 .

It is a cyclic number.

It is not a de Polignac number, because 111331001 - 2² = 111330997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111331061) 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, 64406 + ... + 66111.

It is an arithmetic number, because the mean of its divisors is an integer number (27865593).

Almost surely, 2^111331001 is an apocalyptic number.

It is an amenable number.

111331001 is a deficient number, since it is larger than the sum of its proper divisors (131371).

111331001 is an equidigital number, since it uses as much as digits as its factorization.

111331001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131370.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 111331001 is about 10551.3506718334. The cubic root of 111331001 is about 481.0667838915.

Adding to 111331001 its reverse (100133111), we get a palindrome (211464112).

The spelling of 111331001 in words is "one hundred eleven million, three hundred thirty-one thousand, one".