220003213021 has 2 divisors, whose sum is σ = 220003213022. Its totient is φ = 220003213020.

The previous prime is 220003212983. The next prime is 220003213033. The reversal of 220003213021 is 120312300022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210635102500 + 9368110521 = 458950^2 + 96789^2 .

It is a cyclic number.

It is not a de Polignac number, because 220003213021 - 2⁷ = 220003212893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220003212986 and 220003213004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220003213081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110001606510 + 110001606511.

It is an arithmetic number, because the mean of its divisors is an integer number (110001606511).

Almost surely, 2^220003213021 is an apocalyptic number.

It is an amenable number.

220003213021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220003213021 is an equidigital number, since it uses as much as digits as its factorization.

220003213021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 220003213021 its reverse (120312300022), we get a palindrome (340315513043).

The spelling of 220003213021 in words is "two hundred twenty billion, three million, two hundred thirteen thousand, twenty-one".