20021220122212 has 24 divisors (see below), whose sum is σ = 36033941978496. Its totient is φ = 9728171630688.

The previous prime is 20021220122179. The next prime is 20021220122219. The reversal of 20021220122212 is 21222102212002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021220122212.

It is not an unprimeable number, because it can be changed into a prime (20021220122219) by changing a digit.

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, 295403788 + ... + 295471555.

It is an arithmetic number, because the mean of its divisors is an integer number (1501414249104).

Almost surely, 2^{20021220122212} is an apocalyptic number.

It is an amenable number.

20021220122212 is a deficient number, since it is larger than the sum of its proper divisors (16012721856284).

20021220122212 is a wasteful number, since it uses less digits than its factorization.

20021220122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590875587 (or 590875585 counting only the distinct ones).

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

Adding to 20021220122212 its reverse (21222102212002), we get a palindrome (41243322334214).

The spelling of 20021220122212 in words is "twenty trillion, twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred twelve".