212020130221 has 8 divisors (see below), whose sum is σ = 212244183320. Its totient is φ = 211796140608.

The previous prime is 212020130191. The next prime is 212020130269. The reversal of 212020130221 is 122031020212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21723517321 + 190296612900 = 147389^2 + 436230^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212020130221 - 2⁹ = 212020129709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020130195 and 212020130204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020136221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9627595 + ... + 9649591.

It is an arithmetic number, because the mean of its divisors is an integer number (26530522915).

Almost surely, 2^212020130221 is an apocalyptic number.

It is an amenable number.

212020130221 is a deficient number, since it is larger than the sum of its proper divisors (224053099).

212020130221 is a wasteful number, since it uses less digits than its factorization.

212020130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31743.

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

Adding to 212020130221 its reverse (122031020212), we get a palindrome (334051150433).

The spelling of 212020130221 in words is "two hundred twelve billion, twenty million, one hundred thirty thousand, two hundred twenty-one".