21110222001100 has 108 divisors (see below), whose sum is σ = 46610863665184. Its totient is φ = 8298814296960.

The previous prime is 21110222001079. The next prime is 21110222001139. The reversal of 21110222001100 is 110022201112.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2343752797 + ... + 2343761803.

Almost surely, 2^{21110222001100} is an apocalyptic number.

21110222001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21110222001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23305431832592).

21110222001100 is an abundant number, since it is smaller than the sum of its proper divisors (25500641664084).

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

21110222001100 is a wasteful number, since it uses less digits than its factorization.

21110222001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15872 (or 15806 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21110222001100 its reverse (110022201112), we get a palindrome (21220244202212).

The spelling of 21110222001100 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-two million, one thousand, one hundred".