1171111043 has 2 divisors, whose sum is σ = 1171111044. Its totient is φ = 1171111042.

The previous prime is 1171111009. The next prime is 1171111091. The reversal of 1171111043 is 3401111711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1171111043 - 2¹² = 1171106947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171111093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585555521 + 585555522.

It is an arithmetic number, because the mean of its divisors is an integer number (585555522).

Almost surely, 2^1171111043 is an apocalyptic number.

1171111043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171111043 is an equidigital number, since it uses as much as digits as its factorization.

1171111043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 20.

The square root of 1171111043 is about 34221.4997187441. The cubic root of 1171111043 is about 1054.0616809221.

Adding to 1171111043 its reverse (3401111711), we get a palindrome (4572222754).

The spelling of 1171111043 in words is "one billion, one hundred seventy-one million, one hundred eleven thousand, forty-three".