11021404221 has 6 divisors (see below), whose sum is σ = 15919806110. Its totient is φ = 7347602808.

The previous prime is 11021404213. The next prime is 11021404223. The reversal of 11021404221 is 12240412011.

11021404221 is a `hidden beast` number, since 1 + 102 + 140 + 422 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10915025625 + 106378596 = 104475^2 + 10314^2 .

It is not a de Polignac number, because 11021404221 - 2³ = 11021404213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021404194 and 11021404203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021404223) 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, 612300226 + ... + 612300243.

Almost surely, 2^11021404221 is an apocalyptic number.

It is an amenable number.

11021404221 is a deficient number, since it is larger than the sum of its proper divisors (4898401889).

11021404221 is a wasteful number, since it uses less digits than its factorization.

11021404221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224600475 (or 1224600472 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11021404221 its reverse (12240412011), we get a palindrome (23261816232).

The spelling of 11021404221 in words is "eleven billion, twenty-one million, four hundred four thousand, two hundred twenty-one".