2220223021 has 4 divisors (see below), whose sum is σ = 2274374844. Its totient is φ = 2166071200.

The previous prime is 2220223003. The next prime is 2220223043. The reversal of 2220223021 is 1203220222.

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 421275625 + 1798947396 = 20525^2 + 42414^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220223021 - 2¹¹ = 2220220973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220222986 and 2220223004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220223121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27075850 + ... + 27075931.

It is an arithmetic number, because the mean of its divisors is an integer number (568593711).

Almost surely, 2^2220223021 is an apocalyptic number.

It is an amenable number.

2220223021 is a deficient number, since it is larger than the sum of its proper divisors (54151823).

2220223021 is an equidigital number, since it uses as much as digits as its factorization.

2220223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54151822.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2220223021 is about 47119.2425766799. The cubic root of 2220223021 is about 1304.5644325700.

Adding to 2220223021 its reverse (1203220222), we get a palindrome (3423443243).

The spelling of 2220223021 in words is "two billion, two hundred twenty million, two hundred twenty-three thousand, twenty-one".