220202020211021 has 8 divisors (see below), whose sum is σ = 233159735569464. Its totient is φ = 207244822113280.

The previous prime is 220202020211009. The next prime is 220202020211027. The reversal of 220202020211021 is 120112020202022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 66591899668996 + 153610120542025 = 8160386^2 + 12393955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220202020211021 - 2¹⁸ = 220202019948877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220202020211027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128438540 + ... + 130141701.

It is an arithmetic number, because the mean of its divisors is an integer number (29144966946183).

Almost surely, 2^{220202020211021} is an apocalyptic number.

It is an amenable number.

220202020211021 is a deficient number, since it is larger than the sum of its proper divisors (12957715358443).

220202020211021 is a wasteful number, since it uses less digits than its factorization.

220202020211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258630351.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 220202020211021 its reverse (120112020202022), we get a palindrome (340314040413043).

The spelling of 220202020211021 in words is "two hundred twenty trillion, two hundred two billion, twenty million, two hundred eleven thousand, twenty-one".