1000021222200 has 1152 divisors, whose sum is σ = 4308259253760. Its totient is φ = 186582528000.

The previous prime is 1000021222183. The next prime is 1000021222201. The reversal of 1000021222200 is 22221200001.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021222201) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 244442155 + ... + 244446245.

It is an arithmetic number, because the mean of its divisors is an integer number (3739808380).

Almost surely, 2^{1000021222200} is an apocalyptic number.

1000021222200 is a gapful number since it is divisible by the number (10) 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 1000021222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2154129626880).

1000021222200 is an abundant number, since it is smaller than the sum of its proper divisors (3308238031560).

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

1000021222200 is a wasteful number, since it uses less digits than its factorization.

1000021222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4189 (or 4169 counting only the distinct ones).

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

Adding to 1000021222200 its reverse (22221200001), we get a palindrome (1022242422201).

It can be divided in two parts, 1000021 and 222200, that added together give a palindrome (1222221).

The spelling of 1000021222200 in words is "one trillion, twenty-one million, two hundred twenty-two thousand, two hundred".