1129121791871 has 2 divisors, whose sum is σ = 1129121791872. Its totient is φ = 1129121791870.

The previous prime is 1129121791807. The next prime is 1129121791907. The reversal of 1129121791871 is 1781971219211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1129121791871 - 2⁶ = 1129121791807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1129921791871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564560895935 + 564560895936.

It is an arithmetic number, because the mean of its divisors is an integer number (564560895936).

Almost surely, 2^{1129121791871} is an apocalyptic number.

1129121791871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129121791871 is an equidigital number, since it uses as much as digits as its factorization.

1129121791871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 50.

The spelling of 1129121791871 in words is "one trillion, one hundred twenty-nine billion, one hundred twenty-one million, seven hundred ninety-one thousand, eight hundred seventy-one".