2203220021 has 8 divisors (see below), whose sum is σ = 2247679800. Its totient is φ = 2159029440.

The previous prime is 2203219969. The next prime is 2203220039. The reversal of 2203220021 is 1200223022.

It can be written as a sum of positive squares in 4 ways, for example, as 15319396 + 2187900625 = 3914^2 + 46775^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2203220021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2203219978 and 2203220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2203220821) 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, 50726 + ... + 83543.

It is an arithmetic number, because the mean of its divisors is an integer number (280959975).

Almost surely, 2^2203220021 is an apocalyptic number.

It is an amenable number.

2203220021 is a deficient number, since it is larger than the sum of its proper divisors (44459779).

2203220021 is a wasteful number, since it uses less digits than its factorization.

2203220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134599.

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

The square root of 2203220021 is about 46938.4705865029. The cubic root of 2203220021 is about 1301.2256726415.

Adding to 2203220021 its reverse (1200223022), we get a palindrome (3403443043).

The spelling of 2203220021 in words is "two billion, two hundred three million, two hundred twenty thousand, twenty-one".