2011221200 has 60 divisors (see below), whose sum is σ = 5042067168. Its totient is φ = 769507200.

The previous prime is 2011221197. The next prime is 2011221203. The reversal of 2011221200 is 21221102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2011221197) and next prime (2011221203).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011221203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100106 + ... + 118505.

Almost surely, 2^2011221200 is an apocalyptic number.

2011221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011221200 is an abundant number, since it is smaller than the sum of its proper divisors (3030845968).

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

2011221200 is a wasteful number, since it uses less digits than its factorization.

2011221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218652 (or 218641 counting only the distinct ones).

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

The square root of 2011221200 is about 44846.6408998489. The cubic root of 2011221200 is about 1262.2729611667.

Adding to 2011221200 its reverse (21221102), we get a palindrome (2032442302).

The spelling of 2011221200 in words is "two billion, eleven million, two hundred twenty-one thousand, two hundred".