1313122111 has 4 divisors (see below), whose sum is σ = 1500710992. Its totient is φ = 1125533232.

The previous prime is 1313122093. The next prime is 1313122127. The reversal of 1313122111 is 1112213131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1112213131 = 3533 ⋅314807.

It is a cyclic number.

It is not a de Polignac number, because 1313122111 - 2¹¹ = 1313120063 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 (1313125111) 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, 93794430 + ... + 93794443.

It is an arithmetic number, because the mean of its divisors is an integer number (375177748).

Almost surely, 2^1313122111 is an apocalyptic number.

1313122111 is a deficient number, since it is larger than the sum of its proper divisors (187588881).

1313122111 is an equidigital number, since it uses as much as digits as its factorization.

1313122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187588880.

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

The square root of 1313122111 is about 36237.0267958065. The cubic root of 1313122111 is about 1095.0527447609.

Adding to 1313122111 its reverse (1112213131), we get a palindrome (2425335242).

The spelling of 1313122111 in words is "one billion, three hundred thirteen million, one hundred twenty-two thousand, one hundred eleven".