21220110001100 has 18 divisors (see below), whose sum is σ = 46047638702604. Its totient is φ = 8488044000400.

The previous prime is 21220110001093. The next prime is 21220110001109. The reversal of 21220110001100 is 110001102212.

It is not an unprimeable number, because it can be changed into a prime (21220110001109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106100549906 + ... + 106100550105.

Almost surely, 2^{21220110001100} is an apocalyptic number.

21220110001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220110001100 is an abundant number, since it is smaller than the sum of its proper divisors (24827528701504).

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

21220110001100 is a wasteful number, since it uses less digits than its factorization.

21220110001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212201100025 (or 212201100018 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21220110001100 its reverse (110001102212), we get a palindrome (21330111103312).

The spelling of 21220110001100 in words is "twenty-one trillion, two hundred twenty billion, one hundred ten million, one thousand, one hundred".