1121001109897 has 2 divisors, whose sum is σ = 1121001109898. Its totient is φ = 1121001109896.

The previous prime is 1121001109889. The next prime is 1121001109913. The reversal of 1121001109897 is 7989011001211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1120921917696 + 79192201 = 1058736^2 + 8899^2 .

It is an emirp because it is prime and its reverse (7989011001211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121001109897 - 2³ = 1121001109889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121001100897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560500554948 + 560500554949.

It is an arithmetic number, because the mean of its divisors is an integer number (560500554949).

Almost surely, 2^{1121001109897} is an apocalyptic number.

It is an amenable number.

1121001109897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121001109897 is an equidigital number, since it uses as much as digits as its factorization.

1121001109897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 40.

The spelling of 1121001109897 in words is "one trillion, one hundred twenty-one billion, one million, one hundred nine thousand, eight hundred ninety-seven".