20001020201212 has 36 divisors (see below), whose sum is σ = 37016797828080. Its totient is φ = 9454712988672.

The previous prime is 20001020201167. The next prime is 20001020201219. The reversal of 20001020201212 is 21210202010002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20001020201192 and 20001020201201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001020201219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13517637 + ... + 14924092.

Almost surely, 2^{20001020201212} is an apocalyptic number.

It is an amenable number.

20001020201212 is a deficient number, since it is larger than the sum of its proper divisors (17015777626868).

20001020201212 is a wasteful number, since it uses less digits than its factorization.

20001020201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28442258 (or 28442237 counting only the distinct ones).

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

Adding to 20001020201212 its reverse (21210202010002), we get a palindrome (41211222211214).

The spelling of 20001020201212 in words is "twenty trillion, one billion, twenty million, two hundred one thousand, two hundred twelve".