21202002212 has 12 divisors (see below), whose sum is σ = 37105178460. Its totient is φ = 10600522656.

The previous prime is 21202002187. The next prime is 21202002223. The reversal of 21202002212 is 21220020212.

It can be written as a sum of positive squares in 2 ways, for example, as 4631619136 + 16570383076 = 68056^2 + 128726^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 8423 + ... + 206094.

It is an arithmetic number, because the mean of its divisors is an integer number (3092098205).

Almost surely, 2^21202002212 is an apocalyptic number.

It is an amenable number.

21202002212 is a deficient number, since it is larger than the sum of its proper divisors (15903176248).

21202002212 is a wasteful number, since it uses less digits than its factorization.

21202002212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239230 (or 239228 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21202002212 its reverse (21220020212), we get a palindrome (42422022424).

The spelling of 21202002212 in words is "twenty-one billion, two hundred two million, two thousand, two hundred twelve".