21010111202110 has 16 divisors (see below), whose sum is σ = 38016201215232. Its totient is φ = 8360044247200.

The previous prime is 21010111202099. The next prime is 21010111202147. The reversal of 21010111202110 is 1120211101012.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 5500027201 + ... + 5500031020.

It is an arithmetic number, because the mean of its divisors is an integer number (2376012575952).

Almost surely, 2^{21010111202110} is an apocalyptic number.

21010111202110 is a deficient number, since it is larger than the sum of its proper divisors (17006090013122).

21010111202110 is a wasteful number, since it uses less digits than its factorization.

21010111202110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11000058419.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21010111202110 its reverse (1120211101012), we get a palindrome (22130322303122).

The spelling of 21010111202110 in words is "twenty-one trillion, ten billion, one hundred eleven million, two hundred two thousand, one hundred ten".