220242404242021 has 16 divisors (see below), whose sum is σ = 252019612391040. Its totient is φ = 188543767449600.

The previous prime is 220242404242019. The next prime is 220242404242031. The reversal of 220242404242021 is 120242404242022.

It is a cyclic number.

It is not a de Polignac number, because 220242404242021 - 2¹ = 220242404242019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220242404242031) 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 in 15 ways as a sum of consecutive naturals, for example, 35196846 + ... + 40979296.

It is an arithmetic number, because the mean of its divisors is an integer number (15751225774440).

Almost surely, 2^{220242404242021} is an apocalyptic number.

It is an amenable number.

220242404242021 is a deficient number, since it is larger than the sum of its proper divisors (31777208149019).

220242404242021 is an equidigital number, since it uses as much as digits as its factorization.

220242404242021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789244.

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 220242404242021 its reverse (120242404242022), we get a palindrome (340484808484043).

Subtracting from 220242404242021 its reverse (120242404242022), we obtain a palindrome (99999999999999).

The spelling of 220242404242021 in words is "two hundred twenty trillion, two hundred forty-two billion, four hundred four million, two hundred forty-two thousand, twenty-one".