1121312113 has 4 divisors (see below), whose sum is σ = 1180328560. Its totient is φ = 1062295668.

The previous prime is 1121312107. The next prime is 1121312117. The reversal of 1121312113 is 3112131211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3112131211 = 7 ⋅444590173.

It is a cyclic number.

It is not a de Polignac number, because 1121312113 - 2⁵ = 1121312081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121312117) 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 3 ways as a sum of consecutive naturals, for example, 29508195 + ... + 29508232.

It is an arithmetic number, because the mean of its divisors is an integer number (295082140).

Almost surely, 2^1121312113 is an apocalyptic number.

It is an amenable number.

1121312113 is a deficient number, since it is larger than the sum of its proper divisors (59016447).

1121312113 is an equidigital number, since it uses as much as digits as its factorization.

1121312113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59016446.

The product of its digits is 36, while the sum is 16.

The square root of 1121312113 is about 33485.9987606761. The cubic root of 1121312113 is about 1038.9042060932.

Adding to 1121312113 its reverse (3112131211), we get a palindrome (4233443324).

It can be divided in two parts, 112131211 and 3, that multiplied together give a palindrome (336393633).

The spelling of 1121312113 in words is "one billion, one hundred twenty-one million, three hundred twelve thousand, one hundred thirteen".