21020220301 has 2 divisors, whose sum is σ = 21020220302. Its totient is φ = 21020220300.

The previous prime is 21020220281. The next prime is 21020220323. The reversal of 21020220301 is 10302202012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16815346276 + 4204874025 = 129674^2 + 64845^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020220301 - 2¹¹ = 21020218253 is a prime.

It is a super-3 number, since 3×21020220301³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020220371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510110150 + 10510110151.

It is an arithmetic number, because the mean of its divisors is an integer number (10510110151).

Almost surely, 2^21020220301 is an apocalyptic number.

It is an amenable number.

21020220301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020220301 is an equidigital number, since it uses as much as digits as its factorization.

21020220301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21020220301 its reverse (10302202012), we get a palindrome (31322422313).

The spelling of 21020220301 in words is "twenty-one billion, twenty million, two hundred twenty thousand, three hundred one".