20003221212 has 48 divisors (see below), whose sum is σ = 50273943552. Its totient is φ = 6153681600.

The previous prime is 20003221201. The next prime is 20003221283. The reversal of 20003221212 is 21212230002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20003221191 and 20003221200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1232293 + ... + 1248419.

It is an arithmetic number, because the mean of its divisors is an integer number (1047373824).

Almost surely, 2^20003221212 is an apocalyptic number.

It is an amenable number.

20003221212 is an abundant number, since it is smaller than the sum of its proper divisors (30270722340).

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

20003221212 is a wasteful number, since it uses less digits than its factorization.

20003221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24098 (or 24096 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20003221212 its reverse (21212230002), we get a palindrome (41215451214).

The spelling of 20003221212 in words is "twenty billion, three million, two hundred twenty-one thousand, two hundred twelve".