21222112101100 has 36 divisors (see below), whose sum is σ = 46052482546224. Its totient is φ = 8488752806080.

The previous prime is 21222112101083. The next prime is 21222112101109. The reversal of 21222112101100 is 110121122212.

It is not an unprimeable number, because it can be changed into a prime (21222112101109) 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 11 ways as a sum of consecutive naturals, for example, 8524002 + ... + 10728598.

It is an arithmetic number, because the mean of its divisors is an integer number (1279235626284).

Almost surely, 2^{21222112101100} is an apocalyptic number.

21222112101100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222112101100 is an abundant number, since it is smaller than the sum of its proper divisors (24830370445124).

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

21222112101100 is a wasteful number, since it uses less digits than its factorization.

21222112101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300874 (or 2300867 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21222112101100 its reverse (110121122212), we get a palindrome (21332233223312).

The spelling of 21222112101100 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twelve million, one hundred one thousand, one hundred".