2221430021 has 8 divisors (see below), whose sum is σ = 2229561600. Its totient is φ = 2213309232.

The previous prime is 2221430017. The next prime is 2221430027. The reversal of 2221430021 is 1200341222.

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 2221430021 - 2² = 2221430017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221430027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872276 + ... + 874818.

It is an arithmetic number, because the mean of its divisors is an integer number (278695200).

Almost surely, 2^2221430021 is an apocalyptic number.

It is an amenable number.

2221430021 is a deficient number, since it is larger than the sum of its proper divisors (8131579).

2221430021 is a wasteful number, since it uses less digits than its factorization.

2221430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2221430021 is about 47132.0487672666. The cubic root of 2221430021 is about 1304.8007938127.

Adding to 2221430021 its reverse (1200341222), we get a palindrome (3421771243).

The spelling of 2221430021 in words is "two billion, two hundred twenty-one million, four hundred thirty thousand, twenty-one".