1111109971 has 2 divisors, whose sum is σ = 1111109972. Its totient is φ = 1111109970.

The previous prime is 1111109959. The next prime is 1111110001. The reversal of 1111109971 is 1799011111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111109971 - 2¹¹ = 1111107923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111109941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555554985 + 555554986.

It is an arithmetic number, because the mean of its divisors is an integer number (555554986).

Almost surely, 2^1111109971 is an apocalyptic number.

1111109971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111109971 is an equidigital number, since it uses as much as digits as its factorization.

1111109971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 31.

The square root of 1111109971 is about 33333.3162316623. The cubic root of 1111109971 is about 1035.7438143921.

The spelling of 1111109971 in words is "one billion, one hundred eleven million, one hundred nine thousand, nine hundred seventy-one".