1311130121 has 4 divisors (see below), whose sum is σ = 1498434432. Its totient is φ = 1123825812.

The previous prime is 1311130099. The next prime is 1311130127. The reversal of 1311130121 is 1210311131.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311130121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311130096 and 1311130105.

It is not an unprimeable number, because it can be changed into a prime (1311130127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93652145 + ... + 93652158.

It is an arithmetic number, because the mean of its divisors is an integer number (374608608).

Almost surely, 2^1311130121 is an apocalyptic number.

It is an amenable number.

1311130121 is a deficient number, since it is larger than the sum of its proper divisors (187304311).

1311130121 is an equidigital number, since it uses as much as digits as its factorization.

1311130121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187304310.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1311130121 is about 36209.5308033672. The cubic root of 1311130121 is about 1094.4987373694.

Adding to 1311130121 its reverse (1210311131), we get a palindrome (2521441252).

The spelling of 1311130121 in words is "one billion, three hundred eleven million, one hundred thirty thousand, one hundred twenty-one".