211200022021212 has 144 divisors (see below), whose sum is σ = 626701659118080. Its totient is φ = 58704651006336.

The previous prime is 211200022021199. The next prime is 211200022021273. The reversal of 211200022021212 is 212120220002112.

It is a happy number.

211200022021212 is a `hidden beast` number, since 2 + 11 + 200 + 0 + 220 + 21 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73546803 + ... + 76364469.

Almost surely, 2^{211200022021212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211200022021212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313350829559040).

211200022021212 is an abundant number, since it is smaller than the sum of its proper divisors (415501637096868).

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

211200022021212 is a wasteful number, since it uses less digits than its factorization.

211200022021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825760 (or 2825755 counting only the distinct ones).

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

Adding to 211200022021212 its reverse (212120220002112), we get a palindrome (423320242023324).

The spelling of 211200022021212 in words is "two hundred eleven trillion, two hundred billion, twenty-two million, twenty-one thousand, two hundred twelve".