11000021121209 has 2 divisors, whose sum is σ = 11000021121210. Its totient is φ = 11000021121208.

The previous prime is 11000021121181. The next prime is 11000021121281. The reversal of 11000021121209 is 90212112000011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6740399827984 + 4259621293225 = 2596228^2 + 2063885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11000021121209 is a prime.

It is not a weakly prime, because it can be changed into another prime (11000021126209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500010560604 + 5500010560605.

It is an arithmetic number, because the mean of its divisors is an integer number (5500010560605).

Almost surely, 2^{11000021121209} is an apocalyptic number.

It is an amenable number.

11000021121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000021121209 is an equidigital number, since it uses as much as digits as its factorization.

11000021121209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 11000021121209 in words is "eleven trillion, twenty-one million, one hundred twenty-one thousand, two hundred nine".