21110102 has 32 divisors (see below), whose sum is σ = 36261120. Its totient is φ = 9136800.

The previous prime is 21110099. The next prime is 21110123. The reversal of 21110102 is 20101112.

21110102 is nontrivially palindromic in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 21110102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74453 + ... + 74735.

It is an arithmetic number, because the mean of its divisors is an integer number (1133160).

Almost surely, 2^21110102 is an apocalyptic number.

21110102 is a deficient number, since it is larger than the sum of its proper divisors (15151018).

21110102 is a wasteful number, since it uses less digits than its factorization.

21110102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 21110102 is about 4594.5731031294. The cubic root of 21110102 is about 276.3737410331.

Adding to 21110102 its reverse (20101112), we get a palindrome (41211214).

It can be divided in two parts, 21110 and 102, that added together give a palindrome (21212).

The spelling of 21110102 in words is "twenty-one million, one hundred ten thousand, one hundred two".