1021111122200 has 144 divisors (see below), whose sum is σ = 2580898145280. Its totient is φ = 373491152640.

The previous prime is 1021111122191. The next prime is 1021111122277. The reversal of 1021111122200 is 22211111201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29750249 + ... + 29784551.

Almost surely, 2^{1021111122200} is an apocalyptic number.

1021111122200 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 1021111122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290449072640).

1021111122200 is an abundant number, since it is smaller than the sum of its proper divisors (1559787023080).

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

1021111122200 is a wasteful number, since it uses less digits than its factorization.

1021111122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34546 (or 34430 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021111122200 its reverse (22211111201), we get a palindrome (1043322233401).

The spelling of 1021111122200 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, two hundred".