212000010210221 has 4 divisors (see below), whose sum is σ = 212024715965244. Its totient is φ = 211975304455200.

The previous prime is 212000010210133. The next prime is 212000010210229. The reversal of 212000010210221 is 122012010000212.

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 24313133797225 + 187686876412996 = 4930835^2 + 13699886^2 .

It is a cyclic number.

It is not a de Polignac number, because 212000010210221 - 2³⁸ = 211725132303277 is a prime.

It is a super-2 number, since 2×212000010210221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212000010210196 and 212000010210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212000010210229) 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, 12352864640 + ... + 12352881801.

It is an arithmetic number, because the mean of its divisors is an integer number (53006178991311).

Almost surely, 2^{212000010210221} is an apocalyptic number.

It is an amenable number.

212000010210221 is a deficient number, since it is larger than the sum of its proper divisors (24705755023).

212000010210221 is an equidigital number, since it uses as much as digits as its factorization.

212000010210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24705755022.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212000010210221 its reverse (122012010000212), we get a palindrome (334012020210433).

The spelling of 212000010210221 in words is "two hundred twelve trillion, ten million, two hundred ten thousand, two hundred twenty-one".