11200120011 has 6 divisors (see below), whose sum is σ = 16177951140. Its totient is φ = 7466746668.

The previous prime is 11200119961. The next prime is 11200120051. The reversal of 11200120011 is 11002100211.

It is a happy number.

It is not a de Polignac number, because 11200120011 - 2⁹ = 11200119499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1244457779 = 11200120011 / (1 + 1 + 2 + 0 + 0 + 1 + 2 + 0 + 0 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 11200119975 and 11200120002.

It is not an unprimeable number, because it can be changed into a prime (11200120051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 622228881 + ... + 622228898.

It is an arithmetic number, because the mean of its divisors is an integer number (2696325190).

Almost surely, 2^11200120011 is an apocalyptic number.

11200120011 is a deficient number, since it is larger than the sum of its proper divisors (4977831129).

11200120011 is a wasteful number, since it uses less digits than its factorization.

11200120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244457785 (or 1244457782 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11200120011 its reverse (11002100211), we get a palindrome (22202220222).

The spelling of 11200120011 in words is "eleven billion, two hundred million, one hundred twenty thousand, eleven".