1011143304491 has 2 divisors, whose sum is σ = 1011143304492. Its totient is φ = 1011143304490.

The previous prime is 1011143304443. The next prime is 1011143304499. The reversal of 1011143304491 is 1944033411101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011143304491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011143304499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505571652245 + 505571652246.

It is an arithmetic number, because the mean of its divisors is an integer number (505571652246).

Almost surely, 2^{1011143304491} is an apocalyptic number.

1011143304491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011143304491 is an equidigital number, since it uses as much as digits as its factorization.

1011143304491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

Adding to 1011143304491 its reverse (1944033411101), we get a palindrome (2955176715592).

The spelling of 1011143304491 in words is "one trillion, eleven billion, one hundred forty-three million, three hundred four thousand, four hundred ninety-one".