220022002021 has 4 divisors (see below), whose sum is σ = 220023211500. Its totient is φ = 220020792544.

The previous prime is 220022002009. The next prime is 220022002061. The reversal of 220022002021 is 120200220022.

220022002021 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 103407264900 + 116614737121 = 321570^2 + 341489^2 .

It is a cyclic number.

It is not a de Polignac number, because 220022002021 - 2⁷ = 220022001893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220022001992 and 220022002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220022002061) 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, 270166 + ... + 716263.

It is an arithmetic number, because the mean of its divisors is an integer number (55005802875).

Almost surely, 2^220022002021 is an apocalyptic number.

It is an amenable number.

220022002021 is a deficient number, since it is larger than the sum of its proper divisors (1209479).

220022002021 is an equidigital number, since it uses as much as digits as its factorization.

220022002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209478.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 220022002021 its reverse (120200220022), we get a palindrome (340222222043).

The spelling of 220022002021 in words is "two hundred twenty billion, twenty-two million, two thousand, twenty-one".