11121100009 has 2 divisors, whose sum is σ = 11121100010. Its totient is φ = 11121100008.

The previous prime is 11121099923. The next prime is 11121100021. The reversal of 11121100009 is 90000112111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10105275625 + 1015824384 = 100525^2 + 31872^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121100009 - 2⁷ = 11121099881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121099965 and 11121100001.

It is not a weakly prime, because it can be changed into another prime (11121100049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560550004 + 5560550005.

It is an arithmetic number, because the mean of its divisors is an integer number (5560550005).

Almost surely, 2^11121100009 is an apocalyptic number.

It is an amenable number.

11121100009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121100009 is an equidigital number, since it uses as much as digits as its factorization.

11121100009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 11121100009 in words is "eleven billion, one hundred twenty-one million, one hundred thousand, nine".