220210202021 has 2 divisors, whose sum is σ = 220210202022. Its totient is φ = 220210202020.

The previous prime is 220210201999. The next prime is 220210202063. The reversal of 220210202021 is 120202012022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195022924996 + 25187277025 = 441614^2 + 158705^2 .

It is a cyclic number.

It is not a de Polignac number, because 220210202021 - 2¹⁰ = 220210200997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220210201987 and 220210202005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220210202921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110105101010 + 110105101011.

It is an arithmetic number, because the mean of its divisors is an integer number (110105101011).

Almost surely, 2^220210202021 is an apocalyptic number.

It is an amenable number.

220210202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220210202021 is an equidigital number, since it uses as much as digits as its factorization.

220210202021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 220210202021 its reverse (120202012022), we get a palindrome (340412214043).

The spelling of 220210202021 in words is "two hundred twenty billion, two hundred ten million, two hundred two thousand, twenty-one".