220002021084661 has 2 divisors, whose sum is σ = 220002021084662. Its totient is φ = 220002021084660.

The previous prime is 220002021084617. The next prime is 220002021084763. The reversal of 220002021084661 is 166480120200022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131020645280625 + 88981375804036 = 11446425^2 + 9432994^2 .

It is a cyclic number.

It is not a de Polignac number, because 220002021084661 - 2⁷ = 220002021084533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220002021084061) 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, 110001010542330 + 110001010542331.

It is an arithmetic number, because the mean of its divisors is an integer number (110001010542331).

Almost surely, 2^{220002021084661} is an apocalyptic number.

It is an amenable number.

220002021084661 is a deficient number, since it is larger than the sum of its proper divisors (1).

220002021084661 is an equidigital number, since it uses as much as digits as its factorization.

220002021084661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

Adding to 220002021084661 its reverse (166480120200022), we get a palindrome (386482141284683).

The spelling of 220002021084661 in words is "two hundred twenty trillion, two billion, twenty-one million, eighty-four thousand, six hundred sixty-one".