20202221011212 has 288 divisors, whose sum is σ = 56955882215232. Its totient is φ = 6009209192448.

The previous prime is 20202221011207. The next prime is 20202221011237. The reversal of 20202221011212 is 21211012220202.

It is a happy number.

20202221011212 is a `hidden beast` number, since 20 + 202 + 221 + 0 + 11 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 421584678 + ... + 421632594.

It is an arithmetic number, because the mean of its divisors is an integer number (197763479914).

Almost surely, 2^{20202221011212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20202221011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28477941107616).

20202221011212 is an abundant number, since it is smaller than the sum of its proper divisors (36753661204020).

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

20202221011212 is a wasteful number, since it uses less digits than its factorization.

20202221011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48457 (or 48452 counting only the distinct ones).

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

Adding to 20202221011212 its reverse (21211012220202), we get a palindrome (41413233231414).

The spelling of 20202221011212 in words is "twenty trillion, two hundred two billion, two hundred twenty-one million, eleven thousand, two hundred twelve".