2111222212200 has 288 divisors, whose sum is σ = 7297671014400. Its totient is φ = 546751296000.

The previous prime is 2111222212159. The next prime is 2111222212201. The reversal of 2111222212200 is 22122221112.

It is a happy number.

2111222212200 is a `hidden beast` number, since 21 + 11 + 222 + 212 + 200 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2111222212201) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8552505 + ... + 8795895.

Almost surely, 2^{2111222212200} is an apocalyptic number.

2111222212200 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 2111222212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3648835507200).

2111222212200 is an abundant number, since it is smaller than the sum of its proper divisors (5186448802200).

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

2111222212200 is a wasteful number, since it uses less digits than its factorization.

2111222212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243553 (or 243541 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2111222212200 its reverse (22122221112), we get a palindrome (2133344433312).

The spelling of 2111222212200 in words is "two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred".