220021221020 has 48 divisors (see below), whose sum is σ = 463469368320. Its totient is φ = 87737319936.

The previous prime is 220021220999. The next prime is 220021221023. The reversal of 220021221020 is 20122120022.

220021221020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 220021220986 and 220021221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021221023) 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 15 ways as a sum of consecutive naturals, for example, 20163326 + ... + 20174234.

It is an arithmetic number, because the mean of its divisors is an integer number (9655611840).

Almost surely, 2^220021221020 is an apocalyptic number.

220021221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021221020 is an abundant number, since it is smaller than the sum of its proper divisors (243448147300).

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

220021221020 is a wasteful number, since it uses less digits than its factorization.

220021221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13934 (or 13932 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 220021221020 its reverse (20122120022), we get a palindrome (240143341042).

The spelling of 220021221020 in words is "two hundred twenty billion, twenty-one million, two hundred twenty-one thousand, twenty".