212230010221 has 4 divisors (see below), whose sum is σ = 212247343132. Its totient is φ = 212212677312.

The previous prime is 212230010207. The next prime is 212230010249. The reversal of 212230010221 is 122010032212.

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 146019515625 + 66210494596 = 382125^2 + 257314^2 .

It is a cyclic number.

It is not a de Polignac number, because 212230010221 - 2⁵ = 212230010189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212230010195 and 212230010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212230013221) 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, 8648076 + ... + 8672581.

It is an arithmetic number, because the mean of its divisors is an integer number (53061835783).

Almost surely, 2^212230010221 is an apocalyptic number.

It is an amenable number.

212230010221 is a deficient number, since it is larger than the sum of its proper divisors (17332911).

212230010221 is a wasteful number, since it uses less digits than its factorization.

212230010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17332910.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212230010221 its reverse (122010032212), we get a palindrome (334240042433).

The spelling of 212230010221 in words is "two hundred twelve billion, two hundred thirty million, ten thousand, two hundred twenty-one".