1321111113 has 16 divisors (see below), whose sum is σ = 2017806336. Its totient is φ = 753163920.

The previous prime is 1321111093. The next prime is 1321111117. The reversal of 1321111113 is 3111111231.

It is not a de Polignac number, because 1321111113 - 2⁵ = 1321111081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321111092 and 1321111101.

It is not an unprimeable number, because it can be changed into a prime (1321111117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63931 + ... + 82032.

It is an arithmetic number, because the mean of its divisors is an integer number (126112896).

Almost surely, 2^1321111113 is an apocalyptic number.

It is an amenable number.

1321111113 is a deficient number, since it is larger than the sum of its proper divisors (696695223).

1321111113 is a wasteful number, since it uses less digits than its factorization.

1321111113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146404.

The product of its digits is 18, while the sum is 15.

The square root of 1321111113 is about 36347.0922220747. The cubic root of 1321111113 is about 1097.2690140580.

Adding to 1321111113 its reverse (3111111231), we get a palindrome (4432222344).

The spelling of 1321111113 in words is "one billion, three hundred twenty-one million, one hundred eleven thousand, one hundred thirteen".