111101099999971 has 2 divisors, whose sum is σ = 111101099999972. Its totient is φ = 111101099999970.

The previous prime is 111101099999927. The next prime is 111101100000019. The reversal of 111101099999971 is 179999990101111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111101099999971 - 2³⁷ = 110963661046499 is a prime.

It is a super-2 number, since 2×111101099999971² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111101099999897 and 111101099999906.

It is not a weakly prime, because it can be changed into another prime (111101099999671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550549999985 + 55550549999986.

It is an arithmetic number, because the mean of its divisors is an integer number (55550549999986).

Almost surely, 2^{111101099999971} is an apocalyptic number.

111101099999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101099999971 is an equidigital number, since it uses as much as digits as its factorization.

111101099999971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3720087, while the sum is 67.

The spelling of 111101099999971 in words is "one hundred eleven trillion, one hundred one billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-one".