2220322421 has 4 divisors (see below), whose sum is σ = 2236529292. Its totient is φ = 2204115552.

The previous prime is 2220322409. The next prime is 2220322453. The reversal of 2220322421 is 1242230222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 786185521 + 1434136900 = 28039^2 + 37870^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220322421 - 2¹⁴ = 2220306037 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 = 2220322393 and 2220322402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220322921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8103230 + ... + 8103503.

It is an arithmetic number, because the mean of its divisors is an integer number (559132323).

Almost surely, 2^2220322421 is an apocalyptic number.

It is an amenable number.

2220322421 is a deficient number, since it is larger than the sum of its proper divisors (16206871).

2220322421 is a wasteful number, since it uses less digits than its factorization.

2220322421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16206870.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2220322421 is about 47120.2973356493. The cubic root of 2220322421 is about 1304.5839008499.

Adding to 2220322421 its reverse (1242230222), we get a palindrome (3462552643).

The spelling of 2220322421 in words is "two billion, two hundred twenty million, three hundred twenty-two thousand, four hundred twenty-one".