211212212200 has 96 divisors (see below), whose sum is σ = 537424263360. Its totient is φ = 76558809600.

The previous prime is 211212212191. The next prime is 211212212201. The reversal of 211212212200 is 2212212112.

It is a happy number.

It is a super-2 number, since 2×211212212200² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211212212201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 535237 + ... + 841963.

It is an arithmetic number, because the mean of its divisors is an integer number (5598169410).

Almost surely, 2^211212212200 is an apocalyptic number.

211212212200 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 211212212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268712131680).

211212212200 is an abundant number, since it is smaller than the sum of its proper divisors (326212051160).

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

211212212200 is a wasteful number, since it uses less digits than its factorization.

211212212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307067 (or 307058 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211212212200 its reverse (2212212112), we get a palindrome (213424424312).

The spelling of 211212212200 in words is "two hundred eleven billion, two hundred twelve million, two hundred twelve thousand, two hundred".