111101111009971 has 2 divisors, whose sum is σ = 111101111009972. Its totient is φ = 111101111009970.

The previous prime is 111101111009969. The next prime is 111101111010011. The reversal of 111101111009971 is 179900111101111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111101111009971 - 2¹ = 111101111009969 is a prime.

It is a super-2 number, since 2×111101111009971² (a number of 29 digits) contains 22 as substring.

Together with 111101111009969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111101111009171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550555504985 + 55550555504986.

It is an arithmetic number, because the mean of its divisors is an integer number (55550555504986).

Almost surely, 2^{111101111009971} is an apocalyptic number.

111101111009971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101111009971 is an equidigital number, since it uses as much as digits as its factorization.

111101111009971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 34.

The spelling of 111101111009971 in words is "one hundred eleven trillion, one hundred one billion, one hundred eleven million, nine thousand, nine hundred seventy-one".