111011201971 has 2 divisors, whose sum is σ = 111011201972. Its totient is φ = 111011201970.

The previous prime is 111011201969. The next prime is 111011202011. The reversal of 111011201971 is 179102110111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111011201971 - 2¹ = 111011201969 is a prime.

Together with 111011201969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111011201771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505600985 + 55505600986.

It is an arithmetic number, because the mean of its divisors is an integer number (55505600986).

Almost surely, 2^111011201971 is an apocalyptic number.

111011201971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011201971 is an equidigital number, since it uses as much as digits as its factorization.

111011201971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 25.

The spelling of 111011201971 in words is "one hundred eleven billion, eleven million, two hundred one thousand, nine hundred seventy-one".