11011100212221 has 32 divisors (see below), whose sum is σ = 15162513113088. Its totient is φ = 7102453700160.

The previous prime is 11011100212207. The next prime is 11011100212249. The reversal of 11011100212221 is 12221200111011.

It is a happy number.

It is not a de Polignac number, because 11011100212221 - 2³⁰ = 11010026470397 is a prime.

It is a super-3 number, since 3×11011100212221³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11011100212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011100210221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61457050 + ... + 61635956.

It is an arithmetic number, because the mean of its divisors is an integer number (473828534784).

Almost surely, 2^{11011100212221} is an apocalyptic number.

It is an amenable number.

11011100212221 is a deficient number, since it is larger than the sum of its proper divisors (4151412900867).

11011100212221 is a wasteful number, since it uses less digits than its factorization.

11011100212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182041.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11011100212221 its reverse (12221200111011), we get a palindrome (23232300323232).

The spelling of 11011100212221 in words is "eleven trillion, eleven billion, one hundred million, two hundred twelve thousand, two hundred twenty-one".