212020010000221 has 4 divisors (see below), whose sum is σ = 212275763933500. Its totient is φ = 211764256066944.

The previous prime is 212020010000173. The next prime is 212020010000243. The reversal of 212020010000221 is 122000010020212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80645087628121 + 131374922372100 = 8980261^2 + 11461890^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020010000221 - 2²⁹ = 212019473129309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020010001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127876965396 + ... + 127876967053.

It is an arithmetic number, because the mean of its divisors is an integer number (53068940983375).

Almost surely, 2^{212020010000221} is an apocalyptic number.

It is an amenable number.

212020010000221 is a deficient number, since it is larger than the sum of its proper divisors (255753933279).

212020010000221 is an equidigital number, since it uses as much as digits as its factorization.

212020010000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255753933278.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212020010000221 its reverse (122000010020212), we get a palindrome (334020020020433).

The spelling of 212020010000221 in words is "two hundred twelve trillion, twenty billion, ten million, two hundred twenty-one", and thus it is an aban number.