20021100020212 has 12 divisors (see below), whose sum is σ = 35043393030660. Its totient is φ = 10008702011456.

The previous prime is 20021100020189. The next prime is 20021100020221. The reversal of 20021100020212 is 21202000112002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3722406857316 + 16298693162896 = 1929354^2 + 4037164^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021100020192 and 20021100020201.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 461975287 + ... + 462018622.

It is an arithmetic number, because the mean of its divisors is an integer number (2920282752555).

Almost surely, 2^{20021100020212} is an apocalyptic number.

It is an amenable number.

20021100020212 is a deficient number, since it is larger than the sum of its proper divisors (15022293010448).

20021100020212 is a wasteful number, since it uses less digits than its factorization.

20021100020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923999330 (or 923999328 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021100020212 its reverse (21202000112002), we get a palindrome (41223100132214).

The spelling of 20021100020212 in words is "twenty trillion, twenty-one billion, one hundred million, twenty thousand, two hundred twelve".