1131213043 has 2 divisors, whose sum is σ = 1131213044. Its totient is φ = 1131213042.

The previous prime is 1131213023. The next prime is 1131213047. The reversal of 1131213043 is 3403121311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131213043 - 2⁵ = 1131213011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131213043.

It is not a weakly prime, because it can be changed into another prime (1131213047) 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, 565606521 + 565606522.

It is an arithmetic number, because the mean of its divisors is an integer number (565606522).

Almost surely, 2^1131213043 is an apocalyptic number.

1131213043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131213043 is an equidigital number, since it uses as much as digits as its factorization.

1131213043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1131213043 is about 33633.5107147618. The cubic root of 1131213043 is about 1041.9530125326.

Adding to 1131213043 its reverse (3403121311), we get a palindrome (4534334354).

The spelling of 1131213043 in words is "one billion, one hundred thirty-one million, two hundred thirteen thousand, forty-three".