21102033210 has 64 divisors (see below), whose sum is σ = 52698511872. Its totient is φ = 5403547136.

The previous prime is 21102033191. The next prime is 21102033221. The reversal of 21102033210 is 1233020112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21102033210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66459 + ... + 215918.

It is an arithmetic number, because the mean of its divisors is an integer number (823414248).

Almost surely, 2^21102033210 is an apocalyptic number.

21102033210 is an abundant number, since it is smaller than the sum of its proper divisors (31596478662).

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

21102033210 is a wasteful number, since it uses less digits than its factorization.

21102033210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282487.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21102033210 its reverse (1233020112), we get a palindrome (22335053322).

The spelling of 21102033210 in words is "twenty-one billion, one hundred two million, thirty-three thousand, two hundred ten".