1331320111 has 8 divisors (see below), whose sum is σ = 1452631248. Its totient is φ = 1210056000.

The previous prime is 1331320097. The next prime is 1331320127. The reversal of 1331320111 is 1110231331.

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 1331320111 - 2¹¹ = 1331318063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331320171) 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, 75891 + ... + 91771.

It is an arithmetic number, because the mean of its divisors is an integer number (181578906).

Almost surely, 2^1331320111 is an apocalyptic number.

1331320111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1331320111 is a deficient number, since it is larger than the sum of its proper divisors (121311137).

1331320111 is a wasteful number, since it uses less digits than its factorization.

1331320111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23513.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1331320111 is about 36487.2595709790. The cubic root of 1331320111 is about 1100.0881777798.

Adding to 1331320111 its reverse (1110231331), we get a palindrome (2441551442).

The spelling of 1331320111 in words is "one billion, three hundred thirty-one million, three hundred twenty thousand, one hundred eleven".