21120210210212 has 12 divisors (see below), whose sum is σ = 36960404853120. Its totient is φ = 10560094537896.

The previous prime is 21120210210181. The next prime is 21120210210217. The reversal of 21120210210212 is 21201201202112.

It is not an unprimeable number, because it can be changed into a prime (21120210210217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3380633 + ... + 7325919.

It is an arithmetic number, because the mean of its divisors is an integer number (3080033737760).

Almost surely, 2^{21120210210212} is an apocalyptic number.

It is an amenable number.

21120210210212 is a deficient number, since it is larger than the sum of its proper divisors (15840194642908).

21120210210212 is a wasteful number, since it uses less digits than its factorization.

21120210210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283610 (or 5283608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21120210210212 its reverse (21201201202112), we get a palindrome (42321411412324).

The spelling of 21120210210212 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two hundred ten thousand, two hundred twelve".