11000221221 has 16 divisors (see below), whose sum is σ = 16010846208. Its totient is φ = 6662415600.

The previous prime is 11000221213. The next prime is 11000221223. The reversal of 11000221221 is 12212200011.

It is not a de Polignac number, because 11000221221 - 2³ = 11000221213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11000221197 and 11000221206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000221223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58341 + ... + 159386.

It is an arithmetic number, because the mean of its divisors is an integer number (1000677888).

Almost surely, 2^11000221221 is an apocalyptic number.

11000221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11000221221 is a deficient number, since it is larger than the sum of its proper divisors (5010624987).

11000221221 is a wasteful number, since it uses less digits than its factorization.

11000221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219272.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11000221221 its reverse (12212200011), we get a palindrome (23212421232).

It can be divided in two parts, 11000 and 221221, that added together give a triangular number (232221 = T₆₈₁).

The spelling of 11000221221 in words is "eleven billion, two hundred twenty-one thousand, two hundred twenty-one".