212020010200021 has 4 divisors (see below), whose sum is σ = 212620633458732. Its totient is φ = 211419386941312.

The previous prime is 212020010200001. The next prime is 212020010200027. The reversal of 212020010200021 is 120002010020212.

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 137300064035121 + 74719946164900 = 11717511^2 + 8644070^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020010200021 - 2⁹ = 212020010199509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020010199974 and 212020010200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020010200027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300311628826 + ... + 300311629531.

It is an arithmetic number, because the mean of its divisors is an integer number (53155158364683).

Almost surely, 2^{212020010200021} is an apocalyptic number.

It is an amenable number.

212020010200021 is a deficient number, since it is larger than the sum of its proper divisors (600623258711).

212020010200021 is an equidigital number, since it uses as much as digits as its factorization.

212020010200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600623258710.

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

Adding to 212020010200021 its reverse (120002010020212), we get a palindrome (332022020220233).

The spelling of 212020010200021 in words is "two hundred twelve trillion, twenty billion, ten million, two hundred thousand, twenty-one".