11011221200111 has 4 divisors (see below), whose sum is σ = 12012241309224. Its totient is φ = 10010201091000.

The previous prime is 11011221200099. The next prime is 11011221200137. The reversal of 11011221200111 is 11100212211011.

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

It is not a de Polignac number, because 11011221200111 - 2²⁶ = 11011154091247 is a prime.

It is a super-2 number, since 2×11011221200111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011221200171) 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, 500510054540 + ... + 500510054561.

It is an arithmetic number, because the mean of its divisors is an integer number (3003060327306).

Almost surely, 2^{11011221200111} is an apocalyptic number.

11011221200111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11011221200111 is a deficient number, since it is larger than the sum of its proper divisors (1001020109113).

11011221200111 is a wasteful number, since it uses less digits than its factorization.

11011221200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001020109112.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11011221200111 its reverse (11100212211011), we get a palindrome (22111433411122).

The spelling of 11011221200111 in words is "eleven trillion, eleven billion, two hundred twenty-one million, two hundred thousand, one hundred eleven".