21133102110 has 32 divisors (see below), whose sum is σ = 50976918432. Its totient is φ = 5606885760.

The previous prime is 21133102099. The next prime is 21133102129. The reversal of 21133102110 is 1120133112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21133102110.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1782001 + ... + 1793820.

It is an arithmetic number, because the mean of its divisors is an integer number (1593028701).

Almost surely, 2^21133102110 is an apocalyptic number.

21133102110 is an abundant number, since it is smaller than the sum of its proper divisors (29843816322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21133102110 is a wasteful number, since it uses less digits than its factorization.

21133102110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576028.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21133102110 its reverse (1120133112), we get a palindrome (22253235222).

The spelling of 21133102110 in words is "twenty-one billion, one hundred thirty-three million, one hundred two thousand, one hundred ten".