21022122201100 has 36 divisors (see below), whose sum is σ = 45738369388600. Its totient is φ = 8386661928960.

The previous prime is 21022122201097. The next prime is 21022122201107. The reversal of 21022122201100 is 110222122012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21022122201107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277298805 + ... + 277374604.

Almost surely, 2^{21022122201100} is an apocalyptic number.

21022122201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022122201100 is an abundant number, since it is smaller than the sum of its proper divisors (24716247187500).

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

21022122201100 is a wasteful number, since it uses less digits than its factorization.

21022122201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554673802 (or 554673795 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022122201100 its reverse (110222122012), we get a palindrome (21132344323112).

The spelling of 21022122201100 in words is "twenty-one trillion, twenty-two billion, one hundred twenty-two million, two hundred one thousand, one hundred".