20021022021222 has 24 divisors (see below), whose sum is σ = 45264919353264. Its totient is φ = 6383514267504.

The previous prime is 20021022021191. The next prime is 20021022021239. The reversal of 20021022021222 is 22212022012002.

20021022021222 is a `hidden beast` number, since 2 + 0 + 0 + 210 + 220 + 212 + 22 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20021022021195 and 20021022021204.

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 11 ways as a sum of consecutive naturals, for example, 24179977873 + ... + 24179978700.

It is an arithmetic number, because the mean of its divisors is an integer number (1886038306386).

Almost surely, 2^{20021022021222} is an apocalyptic number.

20021022021222 is an abundant number, since it is smaller than the sum of its proper divisors (25243897332042).

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

20021022021222 is a wasteful number, since it uses less digits than its factorization.

20021022021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48359956604 (or 48359956601 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20021022021222 its reverse (22212022012002), we get a palindrome (42233044033224).

The spelling of 20021022021222 in words is "twenty trillion, twenty-one billion, twenty-two million, twenty-one thousand, two hundred twenty-two".