21211120210210 has 48 divisors (see below), whose sum is σ = 44501786150976. Its totient is φ = 7257925967712.

The previous prime is 21211120210201. The next prime is 21211120210243. The reversal of 21211120210210 is 1201202111212.

It is a super-2 number, since 2×21211120210210² (a number of 27 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 42783352 + ... + 43276291.

It is an arithmetic number, because the mean of its divisors is an integer number (927120544812).

Almost surely, 2^{21211120210210} is an apocalyptic number.

21211120210210 is an abundant number, since it is smaller than the sum of its proper divisors (23290665940766).

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

21211120210210 is a wasteful number, since it uses less digits than its factorization.

21211120210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86060167 (or 86060160 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211120210210 its reverse (1201202111212), we get a palindrome (22412322321422).

The spelling of 21211120210210 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty million, two hundred ten thousand, two hundred ten".