1421423221 has 8 divisors (see below), whose sum is σ = 1463817600. Its totient is φ = 1379639040.

The previous prime is 1421423177. The next prime is 1421423273. The reversal of 1421423221 is 1223241241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1421423221 - 2¹¹ = 1421421173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421423192 and 1421423201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421423321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147820 + ... + 157141.

It is an arithmetic number, because the mean of its divisors is an integer number (182977200).

Almost surely, 2^1421423221 is an apocalyptic number.

It is an amenable number.

1421423221 is a deficient number, since it is larger than the sum of its proper divisors (42394379).

1421423221 is an equidigital number, since it uses as much as digits as its factorization.

1421423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305099.

The product of its digits is 768, while the sum is 22.

The square root of 1421423221 is about 37701.7668153629. The cubic root of 1421423221 is about 1124.3662527037.

Adding to 1421423221 its reverse (1223241241), we get a palindrome (2644664462).

The spelling of 1421423221 in words is "one billion, four hundred twenty-one million, four hundred twenty-three thousand, two hundred twenty-one".