1111121211071 has 2 divisors, whose sum is σ = 1111121211072. Its totient is φ = 1111121211070.

The previous prime is 1111121211059. The next prime is 1111121211107. The reversal of 1111121211071 is 1701121211111.

Together with next prime (1111121211107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111121211071 - 2⁶ = 1111121211007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111121211271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555560605535 + 555560605536.

It is an arithmetic number, because the mean of its divisors is an integer number (555560605536).

Almost surely, 2^{1111121211071} is an apocalyptic number.

1111121211071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111121211071 is an equidigital number, since it uses as much as digits as its factorization.

1111121211071 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 20.

Adding to 1111121211071 its reverse (1701121211111), we get a palindrome (2812242422182).

The spelling of 1111121211071 in words is "one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred eleven thousand, seventy-one".