21100202110 has 16 divisors (see below), whose sum is σ = 40901930496. Its totient is φ = 7790843808.

The previous prime is 21100202059. The next prime is 21100202117. The reversal of 21100202110 is 1120200112.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100202117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81154494 + ... + 81154753.

It is an arithmetic number, because the mean of its divisors is an integer number (2556370656).

Almost surely, 2^21100202110 is an apocalyptic number.

21100202110 is a deficient number, since it is larger than the sum of its proper divisors (19801728386).

21100202110 is a wasteful number, since it uses less digits than its factorization.

21100202110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162309267.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21100202110 its reverse (1120200112), we get a palindrome (22220402222).

The spelling of 21100202110 in words is "twenty-one billion, one hundred million, two hundred two thousand, one hundred ten".