2021120220 has 48 divisors (see below), whose sum is σ = 6467586048. Its totient is φ = 461970240.

The previous prime is 2021120201. The next prime is 2021120221. The reversal of 2021120220 is 220211202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2021120196 and 2021120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021120221) 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, 2405676 + ... + 2406515.

It is an arithmetic number, because the mean of its divisors is an integer number (134741376).

Almost surely, 2^2021120220 is an apocalyptic number.

2021120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021120220 is an abundant number, since it is smaller than the sum of its proper divisors (4446465828).

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

2021120220 is a wasteful number, since it uses less digits than its factorization.

2021120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4812210 (or 4812208 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2021120220 is about 44956.8706651164. The cubic root of 2021120220 is about 1264.3404978837.

Adding to 2021120220 its reverse (220211202), we get a palindrome (2241331422).

The spelling of 2021120220 in words is "two billion, twenty-one million, one hundred twenty thousand, two hundred twenty".