11021200112009 has 4 divisors (see below), whose sum is σ = 11023148358804. Its totient is φ = 11019251865216.

The previous prime is 11021200112003. The next prime is 11021200112023. The reversal of 11021200112009 is 90021100212011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1301595765625 + 9719604346384 = 1140875^2 + 3117628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021200112009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11021200112003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974114912 + ... + 974126225.

It is an arithmetic number, because the mean of its divisors is an integer number (2755787089701).

Almost surely, 2^{11021200112009} is an apocalyptic number.

It is an amenable number.

11021200112009 is a deficient number, since it is larger than the sum of its proper divisors (1948246795).

11021200112009 is an equidigital number, since it uses as much as digits as its factorization.

11021200112009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948246794.

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

The spelling of 11021200112009 in words is "eleven trillion, twenty-one billion, two hundred million, one hundred twelve thousand, nine".