2021222221200 has 2160 divisors, whose sum is σ = 9074058080256. Its totient is φ = 407586816000.

The previous prime is 2021222221181. The next prime is 2021222221211. The reversal of 2021222221200 is 21222221202.

2021222221200 is a `hidden beast` number, since 2 + 0 + 21 + 222 + 221 + 200 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 15915135537 + ... + 15915135663.

Almost surely, 2^{2021222221200} is an apocalyptic number.

2021222221200 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 2021222221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4537029040128).

2021222221200 is an abundant number, since it is smaller than the sum of its proper divisors (7052835859056).

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

2021222221200 is a wasteful number, since it uses less digits than its factorization.

2021222221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2021222221200 its reverse (21222221202), we get a palindrome (2042444442402).

It can be divided in two parts, 2021222 and 221200, that added together give a palindrome (2242422).

The spelling of 2021222221200 in words is "two trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred".