21100224102 has 16 divisors (see below), whose sum is σ = 42210601392. Its totient is φ = 7031715840.

The previous prime is 21100224053. The next prime is 21100224139. The reversal of 21100224102 is 20142200112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395899 + ... + 446022.

It is an arithmetic number, because the mean of its divisors is an integer number (2638162587).

Almost surely, 2^21100224102 is an apocalyptic number.

21100224102 is an abundant number, since it is smaller than the sum of its proper divisors (21110377290).

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

21100224102 is a wasteful number, since it uses less digits than its factorization.

21100224102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846103.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21100224102 its reverse (20142200112), we get a palindrome (41242424214).

The spelling of 21100224102 in words is "twenty-one billion, one hundred million, two hundred twenty-four thousand, one hundred two".