20210220221212 has 24 divisors (see below), whose sum is σ = 40422025558656. Its totient is φ = 8661183284208.

The previous prime is 20210220221203. The next prime is 20210220221249. The reversal of 20210220221212 is 21212202201202.

It is a self number, because there is not a number n which added to its sum of digits gives 20210220221212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13425418 + ... + 14854705.

It is an arithmetic number, because the mean of its divisors is an integer number (1684251064944).

Almost surely, 2^{20210220221212} is an apocalyptic number.

It is an amenable number.

20210220221212 is an abundant number, since it is smaller than the sum of its proper divisors (20211805337444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20210220221212 is a wasteful number, since it uses less digits than its factorization.

20210220221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28305657 (or 28305655 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20210220221212 its reverse (21212202201202), we get a palindrome (41422422422414).

The spelling of 20210220221212 in words is "twenty trillion, two hundred ten billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twelve".