10212020212221 has 8 divisors (see below), whose sum is σ = 15128918832960. Its totient is φ = 6808013474796.

The previous prime is 10212020212153. The next prime is 10212020212243. The reversal of 10212020212221 is 12221202021201.

It is a happy number.

10212020212221 is a `hidden beast` number, since 1 + 0 + 212 + 0 + 20 + 212 + 221 = 666.

It is not a de Polignac number, because 10212020212221 - 2²¹ = 10212018115069 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10212020212194 and 10212020212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212020212021) 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, 189111485385 + ... + 189111485438.

It is an arithmetic number, because the mean of its divisors is an integer number (1891114854120).

Almost surely, 2^{10212020212221} is an apocalyptic number.

It is an amenable number.

10212020212221 is a deficient number, since it is larger than the sum of its proper divisors (4916898620739).

10212020212221 is an equidigital number, since it uses as much as digits as its factorization.

10212020212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378222970832 (or 378222970826 counting only the distinct ones).

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

Adding to 10212020212221 its reverse (12221202021201), we get a palindrome (22433222233422).

The spelling of 10212020212221 in words is "ten trillion, two hundred twelve billion, twenty million, two hundred twelve thousand, two hundred twenty-one".