21102212110 has 48 divisors (see below), whose sum is σ = 44202049920. Its totient is φ = 7232326080.

The previous prime is 21102212107. The next prime is 21102212137. The reversal of 21102212110 is 1121220112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1639500 + ... + 1652320.

It is an arithmetic number, because the mean of its divisors is an integer number (920876040).

Almost surely, 2^21102212110 is an apocalyptic number.

21102212110 is an abundant number, since it is smaller than the sum of its proper divisors (23099837810).

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

21102212110 is a wasteful number, since it uses less digits than its factorization.

21102212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16201 (or 16194 counting only the distinct ones).

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

Adding to 21102212110 its reverse (1121220112), we get a palindrome (22223432222).

The spelling of 21102212110 in words is "twenty-one billion, one hundred two million, two hundred twelve thousand, one hundred ten".