21112102210 has 16 divisors (see below), whose sum is σ = 38011349376. Its totient is φ = 8442715248.

The previous prime is 21112102183. The next prime is 21112102213. The reversal of 21112102210 is 1220121112.

It is not an unprimeable number, because it can be changed into a prime (21112102213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223674 + ... + 303733.

It is an arithmetic number, because the mean of its divisors is an integer number (2375709336).

Almost surely, 2^21112102210 is an apocalyptic number.

21112102210 is a deficient number, since it is larger than the sum of its proper divisors (16899247166).

21112102210 is a wasteful number, since it uses less digits than its factorization.

21112102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531417.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112102210 its reverse (1220121112), we get a palindrome (22332223322).

The spelling of 21112102210 in words is "twenty-one billion, one hundred twelve million, one hundred two thousand, two hundred ten".