20021122212 has 96 divisors (see below), whose sum is σ = 59351384064. Its totient is φ = 5109955200.

The previous prime is 20021122189. The next prime is 20021122217. The reversal of 20021122212 is 21222112002.

It is a junction number, because it is equal to n+sod(n) for n = 20021122191 and 20021122200.

It is not an unprimeable number, because it can be changed into a prime (20021122217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261864 + ... + 329567.

It is an arithmetic number, because the mean of its divisors is an integer number (618243584).

Almost surely, 2^20021122212 is an apocalyptic number.

It is an amenable number.

20021122212 is an abundant number, since it is smaller than the sum of its proper divisors (39330261852).

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

20021122212 is a wasteful number, since it uses less digits than its factorization.

20021122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591489 (or 591487 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20021122212 its reverse (21222112002), we get a palindrome (41243234214).

The spelling of 20021122212 in words is "twenty billion, twenty-one million, one hundred twenty-two thousand, two hundred twelve".