111211121071 has 2 divisors, whose sum is σ = 111211121072. Its totient is φ = 111211121070.

The previous prime is 111211121039. The next prime is 111211121083. The reversal of 111211121071 is 170121112111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111211121071 - 2⁵ = 111211121039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111211151071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605560535 + 55605560536.

It is an arithmetic number, because the mean of its divisors is an integer number (55605560536).

Almost surely, 2^111211121071 is an apocalyptic number.

111211121071 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211121071 is an equidigital number, since it uses as much as digits as its factorization.

111211121071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 19.

Adding to 111211121071 its reverse (170121112111), we get a palindrome (281332233182).

The spelling of 111211121071 in words is "one hundred eleven billion, two hundred eleven million, one hundred twenty-one thousand, seventy-one".