111105971 has 2 divisors, whose sum is σ = 111105972. Its totient is φ = 111105970.

The previous prime is 111105961. The next prime is 111106003. The reversal of 111105971 is 179501111.

It is a weak prime.

It is an emirp because it is prime and its reverse (179501111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111105971 - 2¹⁰ = 111104947 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111105971.

It is not a weakly prime, because it can be changed into another prime (111105961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55552985 + 55552986.

It is an arithmetic number, because the mean of its divisors is an integer number (55552986).

Almost surely, 2^111105971 is an apocalyptic number.

111105971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111105971 is an equidigital number, since it uses as much as digits as its factorization.

111105971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315, while the sum is 26.

The square root of 111105971 is about 10540.6817141967. The cubic root of 111105971 is about 480.7424433318.

The spelling of 111105971 in words is "one hundred eleven million, one hundred five thousand, nine hundred seventy-one".