212121201010200 has 96 divisors (see below), whose sum is σ = 665899466611200. Its totient is φ = 55849632658560.

The previous prime is 212121201010171. The next prime is 212121201010207. The reversal of 212121201010200 is 2010102121212.

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 212121201010200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121201010207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2237518012 + ... + 2237612811.

It is an arithmetic number, because the mean of its divisors is an integer number (6936452777200).

Almost surely, 2^{212121201010200} is an apocalyptic number.

212121201010200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121201010200 is an abundant number, since it is smaller than the sum of its proper divisors (453778265601000).

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

212121201010200 is a wasteful number, since it uses less digits than its factorization.

212121201010200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4475130921 (or 4475130912 counting only the distinct ones).

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

Adding to 212121201010200 its reverse (2010102121212), we get a palindrome (214131303131412).

The spelling of 212121201010200 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred one million, ten thousand, two hundred".