220021002020 has 48 divisors (see below), whose sum is σ = 463050151536. Its totient is φ = 87816960000.

The previous prime is 220021002001. The next prime is 220021002043. The reversal of 220021002020 is 20200120022.

It can be written as a sum of positive squares in 8 ways, for example, as 10337602276 + 209683399744 = 101674^2 + 457912^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220021001992 and 220021002010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23804600 + ... + 23813840.

It is an arithmetic number, because the mean of its divisors is an integer number (9646878157).

Almost surely, 2^220021002020 is an apocalyptic number.

220021002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021002020 is an abundant number, since it is smaller than the sum of its proper divisors (243029149516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220021002020 is a wasteful number, since it uses less digits than its factorization.

220021002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11712 (or 11710 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 220021002020 its reverse (20200120022), we get a palindrome (240221122042).

The spelling of 220021002020 in words is "two hundred twenty billion, twenty-one million, two thousand, twenty".