211200212121012 has 96 divisors (see below), whose sum is σ = 576392019638400. Its totient is φ = 66692816812800.

The previous prime is 211200212120999. The next prime is 211200212121047. The reversal of 211200212121012 is 210121212002112.

211200212121012 is a `hidden beast` number, since 211 + 20 + 0 + 212 + 1 + 210 + 12 = 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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68130712 + ... + 71163152.

It is an arithmetic number, because the mean of its divisors is an integer number (6004083537900).

Almost surely, 2^{211200212121012} is an apocalyptic number.

It is an amenable number.

211200212121012 is an abundant number, since it is smaller than the sum of its proper divisors (365191807517388).

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

211200212121012 is a wasteful number, since it uses less digits than its factorization.

211200212121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066414 (or 3066406 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211200212121012 its reverse (210121212002112), we get a palindrome (421321424123124).

The spelling of 211200212121012 in words is "two hundred eleven trillion, two hundred billion, two hundred twelve million, one hundred twenty-one thousand, twelve".