2221122200 has 48 divisors (see below), whose sum is σ = 5633579160. Its totient is φ = 807680000.

The previous prime is 2221122187. The next prime is 2221122229. The reversal of 2221122200 is 22211222.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502601 + ... + 507000.

Almost surely, 2^2221122200 is an apocalyptic number.

2221122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221122200 is an abundant number, since it is smaller than the sum of its proper divisors (3412456960).

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

2221122200 is a wasteful number, since it uses less digits than its factorization.

2221122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009628 (or 1009619 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2221122200 is about 47128.7831372719. The cubic root of 2221122200 is about 1304.7405227809.

Adding to 2221122200 its reverse (22211222), we get a palindrome (2243333422).

2221122200 divided by its reverse (22211222) gives a square (100 = 10²).

It can be divided in two parts, 2221 and 122200, that added together give a palindrome (124421).

The spelling of 2221122200 in words is "two billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred".