1151111441 has 2 divisors, whose sum is σ = 1151111442. Its totient is φ = 1151111440.

The previous prime is 1151111387. The next prime is 1151111459. The reversal of 1151111441 is 1441111511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1128691216 + 22420225 = 33596^2 + 4735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151111441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1151111041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575555720 + 575555721.

It is an arithmetic number, because the mean of its divisors is an integer number (575555721).

Almost surely, 2^1151111441 is an apocalyptic number.

It is an amenable number.

1151111441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151111441 is an equidigital number, since it uses as much as digits as its factorization.

1151111441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80, while the sum is 20.

The square root of 1151111441 is about 33928.0332615965. The cubic root of 1151111441 is about 1048.0269648215.

Adding to 1151111441 its reverse (1441111511), we get a palindrome (2592222952).

The spelling of 1151111441 in words is "one billion, one hundred fifty-one million, one hundred eleven thousand, four hundred forty-one".