21210110210 has 32 divisors (see below), whose sum is σ = 40601917440. Its totient is φ = 7954647552.

The previous prime is 21210110183. The next prime is 21210110263. The reversal of 21210110210 is 1201101212.

It is a junction number, because it is equal to n+sod(n) for n = 21210110191 and 21210110200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556994 + ... + 593853.

It is an arithmetic number, because the mean of its divisors is an integer number (1268809920).

Almost surely, 2^21210110210 is an apocalyptic number.

21210110210 is a deficient number, since it is larger than the sum of its proper divisors (19391807230).

21210110210 is a wasteful number, since it uses less digits than its factorization.

21210110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150970.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21210110210 its reverse (1201101212), we get a palindrome (22411211422).

The spelling of 21210110210 in words is "twenty-one billion, two hundred ten million, one hundred ten thousand, two hundred ten".