220020011021 has 4 divisors (see below), whose sum is σ = 220113998844. Its totient is φ = 219926023200.

The previous prime is 220020011009. The next prime is 220020011033. The reversal of 220020011021 is 120110020022.

It is a happy number.

220020011021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (220020011009) and next prime (220020011033).

It can be written as a sum of positive squares in 2 ways, for example, as 129261820900 + 90758190121 = 359530^2 + 301261^2 .

It is a cyclic number.

It is not a de Polignac number, because 220020011021 - 2⁶ = 220020010957 is a prime.

It is a super-2 number, since 2×220020011021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220020010993 and 220020011011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020001021) 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 in 3 ways as a sum of consecutive naturals, for example, 46990400 + ... + 46995081.

It is an arithmetic number, because the mean of its divisors is an integer number (55028499711).

Almost surely, 2^220020011021 is an apocalyptic number.

It is an amenable number.

220020011021 is a deficient number, since it is larger than the sum of its proper divisors (93987823).

220020011021 is an equidigital number, since it uses as much as digits as its factorization.

220020011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93987822.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220020011021 its reverse (120110020022), we get a palindrome (340130031043).

Subtracting from 220020011021 its reverse (120110020022), we obtain a palindrome (99909990999).

The spelling of 220020011021 in words is "two hundred twenty billion, twenty million, eleven thousand, twenty-one".