1121818131 has 12 divisors (see below), whose sum is σ = 1851890352. Its totient is φ = 641038896.

The previous prime is 1121818037. The next prime is 1121818157. The reversal of 1121818131 is 1318181211.

It is not a de Polignac number, because 1121818131 - 2¹⁰ = 1121817107 is a prime.

It is a super-2 number, since 2×1121818131² = 2516951838080666322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121818095 and 1121818104.

It is not an unprimeable number, because it can be changed into a prime (1121818331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8903256 + ... + 8903381.

It is an arithmetic number, because the mean of its divisors is an integer number (154324196).

Almost surely, 2^1121818131 is an apocalyptic number.

1121818131 is a deficient number, since it is larger than the sum of its proper divisors (730072221).

1121818131 is a wasteful number, since it uses less digits than its factorization.

1121818131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17806650 (or 17806647 counting only the distinct ones).

The product of its digits is 384, while the sum is 27.

The square root of 1121818131 is about 33493.5535737849. The cubic root of 1121818131 is about 1039.0604591006.

Adding to 1121818131 its reverse (1318181211), we get a palindrome (2439999342).

The spelling of 1121818131 in words is "one billion, one hundred twenty-one million, eight hundred eighteen thousand, one hundred thirty-one".