20122212010221 has 24 divisors (see below), whose sum is σ = 30775438716984. Its totient is φ = 12625582295040.

The previous prime is 20122212010193. The next prime is 20122212010253. The reversal of 20122212010221 is 12201021222102.

It is a happy number.

20122212010221 is a `hidden beast` number, since 20 + 1 + 2 + 221 + 201 + 0 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1672524014121 + 18449687996100 = 1293261^2 + 4295310^2 .

It is not a de Polignac number, because 20122212010221 - 2⁷ = 20122212010093 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20122212010194 and 20122212010203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122212000221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17298085 + ... + 18424661.

It is an arithmetic number, because the mean of its divisors is an integer number (1282309946541).

Almost surely, 2^{20122212010221} is an apocalyptic number.

It is an amenable number.

20122212010221 is a deficient number, since it is larger than the sum of its proper divisors (10653226706763).

20122212010221 is a wasteful number, since it uses less digits than its factorization.

20122212010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243341 (or 1243338 counting only the distinct ones).

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

Adding to 20122212010221 its reverse (12201021222102), we get a palindrome (32323233232323).

The spelling of 20122212010221 in words is "twenty trillion, one hundred twenty-two billion, two hundred twelve million, ten thousand, two hundred twenty-one".