21003200212 has 6 divisors (see below), whose sum is σ = 36755600378. Its totient is φ = 10501600104.

The previous prime is 21003200129. The next prime is 21003200219. The reversal of 21003200212 is 21200230012.

It can be written as a sum of positive squares in only one way, i.e., 18223380036 + 2779820176 = 134994^2 + 52724^2 .

It is a super-2 number, since 2×21003200212² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003200192 and 21003200201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003200219) by changing a digit.

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 as a sum of consecutive naturals, namely, 2625400023 + ... + 2625400030.

Almost surely, 2^21003200212 is an apocalyptic number.

It is an amenable number.

21003200212 is a deficient number, since it is larger than the sum of its proper divisors (15752400166).

21003200212 is a wasteful number, since it uses less digits than its factorization.

21003200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250800057 (or 5250800055 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21003200212 its reverse (21200230012), we get a palindrome (42203430224).

The spelling of 21003200212 in words is "twenty-one billion, three million, two hundred thousand, two hundred twelve".