21100210110210 has 64 divisors (see below), whose sum is σ = 63136213115904. Its totient is φ = 4384459243200.

The previous prime is 21100210110197. The next prime is 21100210110247. The reversal of 21100210110210 is 1201101200112.

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, 4567142736 + ... + 4567147355.

It is an arithmetic number, because the mean of its divisors is an integer number (986503329936).

Almost surely, 2^{21100210110210} is an apocalyptic number.

21100210110210 is an abundant number, since it is smaller than the sum of its proper divisors (42036003005694).

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

21100210110210 is a wasteful number, since it uses less digits than its factorization.

21100210110210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134290119.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21100210110210 its reverse (1201101200112), we get a palindrome (22301311310322).

The spelling of 21100210110210 in words is "twenty-one trillion, one hundred billion, two hundred ten million, one hundred ten thousand, two hundred ten".