2021220000 has 480 divisors, whose sum is σ = 7793755200. Its totient is φ = 508032000.

The previous prime is 2021219983. The next prime is 2021220017. The reversal of 2021220000 is 221202.

It is an interprime number because it is at equal distance from previous prime (2021219983) and next prime (2021220017).

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 10259902 + ... + 10260098.

It is an arithmetic number, because the mean of its divisors is an integer number (16236990).

Almost surely, 2^2021220000 is an apocalyptic number.

2021220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3896877600).

2021220000 is an abundant number, since it is smaller than the sum of its proper divisors (5772535200).

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

2021220000 is a wasteful number, since it uses less digits than its factorization.

2021220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2021220000 is about 44957.9803816853. The cubic root of 2021220000 is about 1264.3613038074.

Adding to 2021220000 its reverse (221202), we get a palindrome (2021441202).

The spelling of 2021220000 in words is "two billion, twenty-one million, two hundred twenty thousand".