11002201221 has 64 divisors (see below), whose sum is σ = 16782474240.
Its totient is φ = 6350400000.
The previous prime is 11002201207. The next prime is 11002201229. The reversal of 11002201221 is 12210220011.
Adding to 11002201221 its reverse (12210220011), we get a palindrome (23212421232).
It is not a de Polignac number, because 11002201221 - 210 = 11002200197 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 11002201197 and 11002201206.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (11002201229) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39153601 + ... + 39153881.
It is an arithmetic number, because the mean of its divisors is an integer number (262226160).
Almost surely, 211002201221 is an apocalyptic number.
11002201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
11002201221 is a deficient number, since it is larger than the sum of its proper divisors (5780273019).
11002201221 is a wasteful number, since it uses less digits than its factorization.
11002201221 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 738.
The product of its (nonzero) digits is 16, while the sum is 12.
The spelling of 11002201221 in words is "eleven billion, two million, two hundred one thousand, two hundred twenty-one".