2021222000 has 160 divisors (see below), whose sum is σ = 5682493440. Its totient is φ = 680966400.

The previous prime is 2021221973. The next prime is 2021222011. The reversal of 2021222000 is 2221202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 824777 + ... + 827223.

It is an arithmetic number, because the mean of its divisors is an integer number (35515584).

Almost surely, 2^2021222000 is an apocalyptic number.

2021222000 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 2021222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2841246720).

2021222000 is an abundant number, since it is smaller than the sum of its proper divisors (3661271440).

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

2021222000 is a wasteful number, since it uses less digits than its factorization.

2021222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536 (or 2520 counting only the distinct ones).

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

The square root of 2021222000 is about 44958.0026246718. The cubic root of 2021222000 is about 1264.3617208363.

Adding to 2021222000 its reverse (2221202), we get a palindrome (2023443202).

The spelling of 2021222000 in words is "two billion, twenty-one million, two hundred twenty-two thousand".