212121220120000 has 140 divisors (see below), whose sum is σ = 533842315432360. Its totient is φ = 83582091648000.

The previous prime is 212121220119937. The next prime is 212121220120039. The reversal of 212121220120000 is 21022121212.

It is a happy number.

212121220120000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36894855 + ... + 42254854.

Almost surely, 2^{212121220120000} is an apocalyptic number.

212121220120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121220120000 is an abundant number, since it is smaller than the sum of its proper divisors (321721095312360).

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

212121220120000 is an frugal number, since it uses more digits than its factorization.

212121220120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79149808 (or 79149783 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212121220120000 its reverse (21022121212), we get a palindrome (212142242241212).

The spelling of 212121220120000 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand".