20212010212221 has 16 divisors (see below), whose sum is σ = 30223566676800. Its totient is φ = 13348741945104.

The previous prime is 20212010212217. The next prime is 20212010212267. The reversal of 20212010212221 is 12221201021202.

It is a happy number.

20212010212221 is a `hidden beast` number, since 20 + 212 + 0 + 1 + 0 + 212 + 221 = 666.

It is not a de Polignac number, because 20212010212221 - 2² = 20212010212217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212010212194 and 20212010212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212010212291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3498095106 + ... + 3498100883.

It is an arithmetic number, because the mean of its divisors is an integer number (1888972917300).

Almost surely, 2^{20212010212221} is an apocalyptic number.

It is an amenable number.

20212010212221 is a deficient number, since it is larger than the sum of its proper divisors (10011556464579).

20212010212221 is a wasteful number, since it uses less digits than its factorization.

20212010212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996196105 (or 6996196099 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20212010212221 its reverse (12221201021202), we get a palindrome (32433211233423).

The spelling of 20212010212221 in words is "twenty trillion, two hundred twelve billion, ten million, two hundred twelve thousand, two hundred twenty-one".