20021202122212 has 48 divisors (see below), whose sum is σ = 35458661574000. Its totient is φ = 9890871312384.

The previous prime is 20021202122203. The next prime is 20021202122231. The reversal of 20021202122212 is 21222120212002.

It can be written as a sum of positive squares in 8 ways, for example, as 405302849956 + 19615899272256 = 636634^2 + 4428984^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20021202122212.

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 15 ways as a sum of consecutive naturals, for example, 405188964 + ... + 405238372.

It is an arithmetic number, because the mean of its divisors is an integer number (738722116125).

Almost surely, 2^{20021202122212} is an apocalyptic number.

It is an amenable number.

20021202122212 is a deficient number, since it is larger than the sum of its proper divisors (15437459451788).

20021202122212 is a wasteful number, since it uses less digits than its factorization.

20021202122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53008 (or 53006 counting only the distinct ones).

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

Adding to 20021202122212 its reverse (21222120212002), we get a palindrome (41243322334214).

The spelling of 20021202122212 in words is "twenty trillion, twenty-one billion, two hundred two million, one hundred twenty-two thousand, two hundred twelve".