21210221210010 has 128 divisors (see below), whose sum is σ = 61331861090304. Its totient is φ = 4589458790400.

The previous prime is 21210221209997. The next prime is 21210221210021. The reversal of 21210221210010 is 1001212201212.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 63 ways as a sum of consecutive naturals, for example, 22167316 + ... + 23104335.

It is an arithmetic number, because the mean of its divisors is an integer number (479155164768).

Almost surely, 2^{21210221210010} is an apocalyptic number.

21210221210010 is an abundant number, since it is smaller than the sum of its proper divisors (40121639880294).

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

21210221210010 is a wasteful number, since it uses less digits than its factorization.

21210221210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45271788.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21210221210010 its reverse (1001212201212), we get a palindrome (22211433411222).

The spelling of 21210221210010 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-one million, two hundred ten thousand, ten".