212121111300 has 144 divisors (see below), whose sum is σ = 717726062592. Its totient is φ = 47357251200.

The previous prime is 212121111263. The next prime is 212121111311. The reversal of 212121111300 is 3111121212.

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 212121111300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1084236 + ... + 1264835.

It is an arithmetic number, because the mean of its divisors is an integer number (4984208768).

Almost surely, 2^212121111300 is an apocalyptic number.

212121111300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121111300 is an abundant number, since it is smaller than the sum of its proper divisors (505604951292).

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

212121111300 is a wasteful number, since it uses less digits than its factorization.

212121111300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349138 (or 2349131 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 212121111300 its reverse (3111121212), we get a palindrome (215232232512).

The spelling of 212121111300 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, three hundred".