2220230021 has 4 divisors (see below), whose sum is σ = 2220438444. Its totient is φ = 2220021600.

The previous prime is 2220230011. The next prime is 2220230027. The reversal of 2220230021 is 1200320222.

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 2212667521 + 7562500 = 47039^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220230021 - 2¹⁴ = 2220213637 is a prime.

It is a super-3 number, since 3×2220230021³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 = 2220229978 and 2220230005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220230027) 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 3 ways as a sum of consecutive naturals, for example, 87320 + ... + 109841.

It is an arithmetic number, because the mean of its divisors is an integer number (555109611).

Almost surely, 2^2220230021 is an apocalyptic number.

It is an amenable number.

2220230021 is a deficient number, since it is larger than the sum of its proper divisors (208423).

2220230021 is a wasteful number, since it uses less digits than its factorization.

2220230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208422.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2220230021 is about 47119.3168562533. The cubic root of 2220230021 is about 1304.5658035947.

Adding to 2220230021 its reverse (1200320222), we get a palindrome (3420550243).

The spelling of 2220230021 in words is "two billion, two hundred twenty million, two hundred thirty thousand, twenty-one".