1121311131 has 4 divisors (see below), whose sum is σ = 1495081512. Its totient is φ = 747540752.

The previous prime is 1121311097. The next prime is 1121311133. The reversal of 1121311131 is 1311131211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121311131 - 2⁷ = 1121311003 is a prime.

It is a super-2 number, since 2×1121311131² = 2514677305008998322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121311131.

It is not an unprimeable number, because it can be changed into a prime (1121311133) 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, 186885186 + ... + 186885191.

It is an arithmetic number, because the mean of its divisors is an integer number (373770378).

Almost surely, 2^1121311131 is an apocalyptic number.

1121311131 is a deficient number, since it is larger than the sum of its proper divisors (373770381).

1121311131 is an equidigital number, since it uses as much as digits as its factorization.

1121311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373770380.

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

The square root of 1121311131 is about 33485.9840978282. The cubic root of 1121311131 is about 1038.9039028163.

Adding to 1121311131 its reverse (1311131211), we get a palindrome (2432442342).

The spelling of 1121311131 in words is "one billion, one hundred twenty-one million, three hundred eleven thousand, one hundred thirty-one".