111011111009971 has 2 divisors, whose sum is σ = 111011111009972. Its totient is φ = 111011111009970.

The previous prime is 111011111009963. The next prime is 111011111010043. The reversal of 111011111009971 is 179900111110111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111011111009971 - 2³ = 111011111009963 is a prime.

It is a super-2 number, since 2×111011111009971² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111011111009921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505555504985 + 55505555504986.

It is an arithmetic number, because the mean of its divisors is an integer number (55505555504986).

Almost surely, 2^{111011111009971} is an apocalyptic number.

111011111009971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011111009971 is an equidigital number, since it uses as much as digits as its factorization.

111011111009971 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 34.

The spelling of 111011111009971 in words is "one hundred eleven trillion, eleven billion, one hundred eleven million, nine thousand, nine hundred seventy-one".