2211021200 has 60 divisors (see below), whose sum is σ = 5319930708. Its totient is φ = 883084800.

The previous prime is 2211021133. The next prime is 2211021229. The reversal of 2211021200 is 21201122.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4276624 + 2206744576 = 2068^2 + 46976^2 .

It is a super-2 number, since 2×2211021200² = 9777229493698880000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289430 + ... + 296970.

Almost surely, 2^2211021200 is an apocalyptic number.

2211021200 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 2211021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2659965354).

2211021200 is an abundant number, since it is smaller than the sum of its proper divisors (3108909508).

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

2211021200 is a wasteful number, since it uses less digits than its factorization.

2211021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8292 (or 8281 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2211021200 is about 47021.4972113819. The cubic root of 2211021200 is about 1302.7596602872.

Adding to 2211021200 its reverse (21201122), we get a palindrome (2232222322).

The spelling of 2211021200 in words is "two billion, two hundred eleven million, twenty-one thousand, two hundred".