1123131133 has 4 divisors (see below), whose sum is σ = 1123286940. Its totient is φ = 1122975328.

The previous prime is 1123131131. The next prime is 1123131143. The reversal of 1123131133 is 3311313211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 601328484 + 521802649 = 24522^2 + 22843^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123131133 - 2¹ = 1123131131 is a prime.

It is a super-2 number, since 2×1123131133² = 2522847083827727378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123131133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123131131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66538 + ... + 81691.

It is an arithmetic number, because the mean of its divisors is an integer number (280821735).

Almost surely, 2^1123131133 is an apocalyptic number.

It is an amenable number.

1123131133 is a deficient number, since it is larger than the sum of its proper divisors (155807).

1123131133 is an equidigital number, since it uses as much as digits as its factorization.

1123131133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155806.

The product of its digits is 162, while the sum is 19.

The square root of 1123131133 is about 33513.1486583997. The cubic root of 1123131133 is about 1039.4656812140.

Adding to 1123131133 its reverse (3311313211), we get a palindrome (4434444344).

The spelling of 1123131133 in words is "one billion, one hundred twenty-three million, one hundred thirty-one thousand, one hundred thirty-three".