21102110211102 has 8 divisors (see below), whose sum is σ = 42204220422216. Its totient is φ = 7034036737032.

The previous prime is 21102110211079. The next prime is 21102110211137. The reversal of 21102110211102 is 20111201120112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21102110211102 is an admirable number.

It is a super-2 number, since 2×21102110211102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1758509184253 + ... + 1758509184264.

It is an arithmetic number, because the mean of its divisors is an integer number (5275527552777).

Almost surely, 2^{21102110211102} is an apocalyptic number.

21102110211102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21102110211102 is a wasteful number, since it uses less digits than its factorization.

21102110211102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517018368522.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21102110211102 its reverse (20111201120112), we get a palindrome (41213311331214).

The spelling of 21102110211102 in words is "twenty-one trillion, one hundred two billion, one hundred ten million, two hundred eleven thousand, one hundred two".