20021200212 has 24 divisors (see below), whose sum is σ = 50309682976. Its totient is φ = 6160369248.

The previous prime is 20021200189. The next prime is 20021200223. The reversal of 20021200212 is 21200212002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64170358 + ... + 64170669.

Almost surely, 2^20021200212 is an apocalyptic number.

It is an amenable number.

20021200212 is an abundant number, since it is smaller than the sum of its proper divisors (30288482764).

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

20021200212 is a wasteful number, since it uses less digits than its factorization.

20021200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128341047 (or 128341045 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20021200212 its reverse (21200212002), we get a palindrome (41221412214).

The spelling of 20021200212 in words is "twenty billion, twenty-one million, two hundred thousand, two hundred twelve".