212020002121221 has 24 divisors (see below), whose sum is σ = 350244498839040. Its totient is φ = 121070093485536.

The previous prime is 212020002121219. The next prime is 212020002121297. The reversal of 212020002121221 is 122121200020212.

It is a happy number.

212020002121221 is a `hidden beast` number, since 2 + 120 + 200 + 0 + 2 + 121 + 221 = 666.

It is not a de Polignac number, because 212020002121221 - 2¹ = 212020002121219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212020002121194 and 212020002121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020002121021) 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 23 ways as a sum of consecutive naturals, for example, 1169261970 + ... + 1169443283.

It is an arithmetic number, because the mean of its divisors is an integer number (14593520784960).

Almost surely, 2^{212020002121221} is an apocalyptic number.

212020002121221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212020002121221 is a deficient number, since it is larger than the sum of its proper divisors (138224496717819).

212020002121221 is a wasteful number, since it uses less digits than its factorization.

212020002121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338706705 (or 2338706702 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212020002121221 its reverse (122121200020212), we get a palindrome (334141202141433).

The spelling of 212020002121221 in words is "two hundred twelve trillion, twenty billion, two million, one hundred twenty-one thousand, two hundred twenty-one".