21002221110110 has 16 divisors (see below), whose sum is σ = 37882920758400. Its totient is φ = 8383350052896.

The previous prime is 21002221110109. The next prime is 21002221110119. The reversal of 21002221110110 is 1101112220012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002221110119) 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, 2192293865 + ... + 2192303444.

It is an arithmetic number, because the mean of its divisors is an integer number (2367682547400).

Almost surely, 2^{21002221110110} is an apocalyptic number.

21002221110110 is a deficient number, since it is larger than the sum of its proper divisors (16880699648290).

21002221110110 is a wasteful number, since it uses less digits than its factorization.

21002221110110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384597795.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21002221110110 its reverse (1101112220012), we get a palindrome (22103333330122).

The spelling of 21002221110110 in words is "twenty-one trillion, two billion, two hundred twenty-one million, one hundred ten thousand, one hundred ten".