1113123131 has 2 divisors, whose sum is σ = 1113123132. Its totient is φ = 1113123130.

The previous prime is 1113123103. The next prime is 1113123139. The reversal of 1113123131 is 1313213111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113123131 is a prime.

It is a super-2 number, since 2×1113123131² = 2478086209534486322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1113123139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556561565 + 556561566.

It is an arithmetic number, because the mean of its divisors is an integer number (556561566).

Almost surely, 2^1113123131 is an apocalyptic number.

1113123131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113123131 is an equidigital number, since it uses as much as digits as its factorization.

1113123131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54, while the sum is 17.

The square root of 1113123131 is about 33363.4999812670. The cubic root of 1113123131 is about 1036.3689730274.

Adding to 1113123131 its reverse (1313213111), we get a palindrome (2426336242).

The spelling of 1113123131 in words is "one billion, one hundred thirteen million, one hundred twenty-three thousand, one hundred thirty-one".