21102111120223 has 32 divisors (see below), whose sum is σ = 24328929905280. Its totient is φ = 17929057466880.

The previous prime is 21102111120149. The next prime is 21102111120229. The reversal of 21102111120223 is 32202111120112.

It is not a de Polignac number, because 21102111120223 - 2³⁷ = 20964672166751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21102111120223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102111120229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 887041413 + ... + 887065201.

It is an arithmetic number, because the mean of its divisors is an integer number (760279059540).

Almost surely, 2^{21102111120223} is an apocalyptic number.

21102111120223 is a deficient number, since it is larger than the sum of its proper divisors (3226818785057).

21102111120223 is a wasteful number, since it uses less digits than its factorization.

21102111120223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26227.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21102111120223 its reverse (32202111120112), we get a palindrome (53304222240335).

The spelling of 21102111120223 in words is "twenty-one trillion, one hundred two billion, one hundred eleven million, one hundred twenty thousand, two hundred twenty-three".