21202200100100 has 36 divisors (see below), whose sum is σ = 46041106763904. Its totient is φ = 8474920123680.

The previous prime is 21202200100079. The next prime is 21202200100127. The reversal of 21202200100100 is 100100220212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74355944 + ... + 74640543.

Almost surely, 2^{21202200100100} is an apocalyptic number.

21202200100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202200100100 is an abundant number, since it is smaller than the sum of its proper divisors (24838906663804).

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

21202200100100 is a wasteful number, since it uses less digits than its factorization.

21202200100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148997924 (or 148997917 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21202200100100 its reverse (100100220212), we get a palindrome (21302300320312).

The spelling of 21202200100100 in words is "twenty-one trillion, two hundred two billion, two hundred million, one hundred thousand, one hundred".