4021411221 has 12 divisors (see below), whose sum is σ = 5895403072. Its totient is φ = 2640926376.

The previous prime is 4021411211. The next prime is 4021411243. The reversal of 4021411221 is 1221141204.

4021411221 is a `hidden beast` number, since 402 + 1 + 41 + 1 + 221 = 666.

It is not a de Polignac number, because 4021411221 - 2⁵ = 4021411189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4021411194 and 4021411203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021411201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3333901 + ... + 3335106.

Almost surely, 2^4021411221 is an apocalyptic number.

It is an amenable number.

4021411221 is a deficient number, since it is larger than the sum of its proper divisors (1873991851).

4021411221 is a wasteful number, since it uses less digits than its factorization.

4021411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669080 (or 6669077 counting only the distinct ones).

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

The square root of 4021411221 is about 63414.5978541219. The cubic root of 4021411221 is about 1590.2283628330.

Adding to 4021411221 its reverse (1221141204), we get a palindrome (5242552425).

The spelling of 4021411221 in words is "four billion, twenty-one million, four hundred eleven thousand, two hundred twenty-one".