111555465971 has 2 divisors, whose sum is σ = 111555465972. Its totient is φ = 111555465970.

The previous prime is 111555465929. The next prime is 111555466027. The reversal of 111555465971 is 179564555111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111555465971 - 2¹⁸ = 111555203827 is a prime.

It is not a weakly prime, because it can be changed into another prime (111555465071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55777732985 + 55777732986.

It is an arithmetic number, because the mean of its divisors is an integer number (55777732986).

Almost surely, 2^111555465971 is an apocalyptic number.

111555465971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111555465971 is an equidigital number, since it uses as much as digits as its factorization.

111555465971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 945000, while the sum is 50.

The spelling of 111555465971 in words is "one hundred eleven billion, five hundred fifty-five million, four hundred sixty-five thousand, nine hundred seventy-one".