4421101221 has 24 divisors (see below), whose sum is σ = 6555051360. Its totient is φ = 2870329056.

The previous prime is 4421101219. The next prime is 4421101229. The reversal of 4421101221 is 1221011244.

4421101221 is a `hidden beast` number, since 442 + 1 + 1 + 0 + 1 + 221 = 666.

It is not a de Polignac number, because 4421101221 - 2¹ = 4421101219 is a prime.

It is a super-2 number, since 2×4421101221² = 39092272012655381682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4421101194 and 4421101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421101229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17911 + ... + 95723.

It is an arithmetic number, because the mean of its divisors is an integer number (273127140).

Almost surely, 2^4421101221 is an apocalyptic number.

It is an amenable number.

4421101221 is a deficient number, since it is larger than the sum of its proper divisors (2133950139).

4421101221 is a wasteful number, since it uses less digits than its factorization.

4421101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77985 (or 77982 counting only the distinct ones).

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

The square root of 4421101221 is about 66491.3620028948. The cubic root of 4421101221 is about 1641.2578617027.

Adding to 4421101221 its reverse (1221011244), we get a palindrome (5642112465).

The spelling of 4421101221 in words is "four billion, four hundred twenty-one million, one hundred one thousand, two hundred twenty-one".