1121022111689 has 2 divisors, whose sum is σ = 1121022111690. Its totient is φ = 1121022111688.

The previous prime is 1121022111683. The next prime is 1121022111691. The reversal of 1121022111689 is 9861112201211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697071368464 + 423950743225 = 834908^2 + 651115^2 .

It is an emirp because it is prime and its reverse (9861112201211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121022111689 - 2⁴ = 1121022111673 is a prime.

It is a super-3 number, since 3×1121022111689³ (a number of 37 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 1121022111691, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1121022111683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560511055844 + 560511055845.

It is an arithmetic number, because the mean of its divisors is an integer number (560511055845).

Almost surely, 2^{1121022111689} is an apocalyptic number.

It is an amenable number.

1121022111689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121022111689 is an equidigital number, since it uses as much as digits as its factorization.

1121022111689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 35.

The spelling of 1121022111689 in words is "one trillion, one hundred twenty-one billion, twenty-two million, one hundred eleven thousand, six hundred eighty-nine".