21210100202212 has 48 divisors (see below), whose sum is σ = 38115128364544. Its totient is φ = 10324179648000.

The previous prime is 21210100202153. The next prime is 21210100202293. The reversal of 21210100202212 is 21220200101212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8478637 + ... + 10691467.

Almost surely, 2^{21210100202212} is an apocalyptic number.

It is an amenable number.

21210100202212 is a deficient number, since it is larger than the sum of its proper divisors (16905028162332).

21210100202212 is a wasteful number, since it uses less digits than its factorization.

21210100202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213300 (or 2213298 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21210100202212 its reverse (21220200101212), we get a palindrome (42430300303424).

The spelling of 21210100202212 in words is "twenty-one trillion, two hundred ten billion, one hundred million, two hundred two thousand, two hundred twelve".