1121304131 has 4 divisors (see below), whose sum is σ = 1157475264. Its totient is φ = 1085133000.

The previous prime is 1121304127. The next prime is 1121304143. The reversal of 1121304131 is 1314031211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1314031211 = 5227 ⋅251393.

It is a cyclic number.

It is not a de Polignac number, because 1121304131 - 2² = 1121304127 is a prime.

It is a super-2 number, since 2×1121304131² = 2514645908395330322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121304101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18085520 + ... + 18085581.

It is an arithmetic number, because the mean of its divisors is an integer number (289368816).

Almost surely, 2^1121304131 is an apocalyptic number.

1121304131 is a deficient number, since it is larger than the sum of its proper divisors (36171133).

1121304131 is an equidigital number, since it uses as much as digits as its factorization.

1121304131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36171132.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1121304131 is about 33485.8795763229. The cubic root of 1121304131 is about 1038.9017409594.

Adding to 1121304131 its reverse (1314031211), we get a palindrome (2435335342).

The spelling of 1121304131 in words is "one billion, one hundred twenty-one million, three hundred four thousand, one hundred thirty-one".