1123343131 has 2 divisors, whose sum is σ = 1123343132. Its totient is φ = 1123343130.

The previous prime is 1123343093. The next prime is 1123343147. The reversal of 1123343131 is 1313433211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1313433211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123343131 - 2²⁵ = 1089788699 is a prime.

It is a super-2 number, since 2×1123343131² = 2523799579929766322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123343171) 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 as a sum of consecutive naturals, namely, 561671565 + 561671566.

It is an arithmetic number, because the mean of its divisors is an integer number (561671566).

Almost surely, 2^1123343131 is an apocalyptic number.

1123343131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123343131 is an equidigital number, since it uses as much as digits as its factorization.

1123343131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

The square root of 1123343131 is about 33516.3114169802. The cubic root of 1123343131 is about 1039.5310789743.

Adding to 1123343131 its reverse (1313433211), we get a palindrome (2436776342).

The spelling of 1123343131 in words is "one billion, one hundred twenty-three million, three hundred forty-three thousand, one hundred thirty-one".