220302221021 has 2 divisors, whose sum is σ = 220302221022. Its totient is φ = 220302221020.

The previous prime is 220302220981. The next prime is 220302221047. The reversal of 220302221021 is 120122203022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124069495225 + 96232725796 = 352235^2 + 310214^2 .

It is a cyclic number.

It is not a de Polignac number, because 220302221021 - 2²² = 220298026717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220302221521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110151110510 + 110151110511.

It is an arithmetic number, because the mean of its divisors is an integer number (110151110511).

Almost surely, 2^220302221021 is an apocalyptic number.

It is an amenable number.

220302221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220302221021 is an equidigital number, since it uses as much as digits as its factorization.

220302221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 220302221021 its reverse (120122203022), we get a palindrome (340424424043).

The spelling of 220302221021 in words is "two hundred twenty billion, three hundred two million, two hundred twenty-one thousand, twenty-one".