2021102220 has 48 divisors (see below), whose sum is σ = 5854232160. Its totient is φ = 520375296.

The previous prime is 2021102201. The next prime is 2021102221. The reversal of 2021102220 is 222011202.

2021102220 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 = 2021102196 and 2021102205.

It is not an unprimeable number, because it can be changed into a prime (2021102221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579037 + ... + 582516.

It is an arithmetic number, because the mean of its divisors is an integer number (121963170).

Almost surely, 2^2021102220 is an apocalyptic number.

2021102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021102220 is an abundant number, since it is smaller than the sum of its proper divisors (3833129940).

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

2021102220 is a wasteful number, since it uses less digits than its factorization.

2021102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161594 (or 1161592 counting only the distinct ones).

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

The square root of 2021102220 is about 44956.6704728008. The cubic root of 2021102220 is about 1264.3367444873.

Adding to 2021102220 its reverse (222011202), we get a palindrome (2243113422).

The spelling of 2021102220 in words is "two billion, twenty-one million, one hundred two thousand, two hundred twenty".