212013202221 has 20 divisors (see below), whose sum is σ = 319128737664. Its totient is φ = 140263180200.

The previous prime is 212013202217. The next prime is 212013202223. The reversal of 212013202221 is 122202310212.

212013202221 is a `hidden beast` number, since 2 + 120 + 1 + 320 + 2 + 221 = 666.

It is not a de Polignac number, because 212013202221 - 2² = 212013202217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212013202194 and 212013202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212013202223) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9979645 + ... + 10000866.

Almost surely, 2^212013202221 is an apocalyptic number.

It is an amenable number.

212013202221 is a deficient number, since it is larger than the sum of its proper divisors (107115535443).

212013202221 is a wasteful number, since it uses less digits than its factorization.

212013202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19980654 (or 19980645 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212013202221 its reverse (122202310212), we get a palindrome (334215512433).

The spelling of 212013202221 in words is "two hundred twelve billion, thirteen million, two hundred two thousand, two hundred twenty-one".