20021101012212 has 48 divisors (see below), whose sum is σ = 48585963340992. Its totient is φ = 6411637370880.

The previous prime is 20021101012183. The next prime is 20021101012219. The reversal of 20021101012212 is 21221010112002.

It is a junction number, because it is equal to n+sod(n) for n = 20021101012191 and 20021101012200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021101012219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318006093 + ... + 318069044.

It is an arithmetic number, because the mean of its divisors is an integer number (1012207569604).

Almost surely, 2^{20021101012212} is an apocalyptic number.

It is an amenable number.

20021101012212 is an abundant number, since it is smaller than the sum of its proper divisors (28564862328780).

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

20021101012212 is a wasteful number, since it uses less digits than its factorization.

20021101012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636075248 (or 636075246 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20021101012212 its reverse (21221010112002), we get a palindrome (41242111124214).

The spelling of 20021101012212 in words is "twenty trillion, twenty-one billion, one hundred one million, twelve thousand, two hundred twelve".