212120020101220 has 96 divisors (see below), whose sum is σ = 555385362174720. Its totient is φ = 66113356861440.

The previous prime is 212120020101193. The next prime is 212120020101221. The reversal of 212120020101220 is 22101020021212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212120020101194 and 212120020101203.

It is not an unprimeable number, because it can be changed into a prime (212120020101221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49964812 + ... + 54043708.

It is an arithmetic number, because the mean of its divisors is an integer number (5785264189320).

Almost surely, 2^{212120020101220} is an apocalyptic number.

212120020101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212120020101220 is an abundant number, since it is smaller than the sum of its proper divisors (343265342073500).

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

212120020101220 is a wasteful number, since it uses less digits than its factorization.

212120020101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112693 (or 4112691 counting only the distinct ones).

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

Adding to 212120020101220 its reverse (22101020021212), we get a palindrome (234221040122432).

The spelling of 212120020101220 in words is "two hundred twelve trillion, one hundred twenty billion, twenty million, one hundred one thousand, two hundred twenty".