1121201000009 has 2 divisors, whose sum is σ = 1121201000010. Its totient is φ = 1121201000008.

The previous prime is 1121200999991. The next prime is 1121201000011. The reversal of 1121201000009 is 9000001021211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1074912768400 + 46288231609 = 1036780^2 + 215147^2 .

It is an emirp because it is prime and its reverse (9000001021211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121201000009 - 2¹² = 1121200995913 is a prime.

Together with 1121201000011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1121201000089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560600500004 + 560600500005.

It is an arithmetic number, because the mean of its divisors is an integer number (560600500005).

Almost surely, 2^{1121201000009} is an apocalyptic number.

It is an amenable number.

1121201000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121201000009 is an equidigital number, since it uses as much as digits as its factorization.

1121201000009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 1121201000009 in words is "one trillion, one hundred twenty-one billion, two hundred one million, nine", and thus it is an aban number.