1204420221 has 24 divisors (see below), whose sum is σ = 1763667360. Its totient is φ = 791927136.

The previous prime is 1204420219. The next prime is 1204420247. The reversal of 1204420221 is 1220244021.

1204420221 is a `hidden beast` number, since 1 + 2 + 0 + 442 + 0 + 221 = 666.

It is not a de Polignac number, because 1204420221 - 2¹ = 1204420219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1204420194 and 1204420203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204420421) 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, 640735 + ... + 642611.

It is an arithmetic number, because the mean of its divisors is an integer number (73486140).

Almost surely, 2^1204420221 is an apocalyptic number.

It is an amenable number.

1204420221 is a deficient number, since it is larger than the sum of its proper divisors (559247139).

1204420221 is a wasteful number, since it uses less digits than its factorization.

1204420221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825 (or 2822 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1204420221 is about 34704.7579014751. The cubic root of 1204420221 is about 1063.9617442127.

Adding to 1204420221 its reverse (1220244021), we get a palindrome (2424664242).

The spelling of 1204420221 in words is "one billion, two hundred four million, four hundred twenty thousand, two hundred twenty-one".