212111221200 has 120 divisors (see below), whose sum is σ = 683217583776. Its totient is φ = 56250432000.

The previous prime is 212111221183. The next prime is 212111221211. The reversal of 212111221200 is 2122111212.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212111221200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271086 + ... + 705485.

Almost surely, 2^212111221200 is an apocalyptic number.

212111221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111221200 is an abundant number, since it is smaller than the sum of its proper divisors (471106362576).

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

212111221200 is a wasteful number, since it uses less digits than its factorization.

212111221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976773 (or 976762 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212111221200 its reverse (2122111212), we get a palindrome (214233332412).

The spelling of 212111221200 in words is "two hundred twelve billion, one hundred eleven million, two hundred twenty-one thousand, two hundred".