21210012202212 has 36 divisors (see below), whose sum is σ = 53614865471440. Its totient is φ = 7069915984752.

The previous prime is 21210012202201. The next prime is 21210012202241. The reversal of 21210012202212 is 21220221001212.

It is a happy number.

21210012202212 is a `hidden beast` number, since 21 + 210 + 0 + 1 + 220 + 2 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 707662 + ... + 6551397.

Almost surely, 2^{21210012202212} is an apocalyptic number.

It is an amenable number.

21210012202212 is an abundant number, since it is smaller than the sum of its proper divisors (32404853269228).

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

21210012202212 is a wasteful number, since it uses less digits than its factorization.

21210012202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340232 (or 7340227 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21210012202212 its reverse (21220221001212), we get a palindrome (42430233203424).

The spelling of 21210012202212 in words is "twenty-one trillion, two hundred ten billion, twelve million, two hundred two thousand, two hundred twelve".