21010202212 has 12 divisors (see below), whose sum is σ = 37011350656. Its totient is φ = 10435530600.

The previous prime is 21010202207. The next prime is 21010202249. The reversal of 21010202212 is 21220201012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21010202192 and 21010202201.

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 3 ways as a sum of consecutive naturals, for example, 17391948 + ... + 17393155.

Almost surely, 2^21010202212 is an apocalyptic number.

It is an amenable number.

21010202212 is a deficient number, since it is larger than the sum of its proper divisors (16001148444).

21010202212 is a wasteful number, since it uses less digits than its factorization.

21010202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34785258 (or 34785256 counting only the distinct ones).

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

Adding to 21010202212 its reverse (21220201012), we get a palindrome (42230403224).

The spelling of 21010202212 in words is "twenty-one billion, ten million, two hundred two thousand, two hundred twelve".