21220100011100 has 36 divisors (see below), whose sum is σ = 46630498269600. Its totient is φ = 8380596456960.

The previous prime is 21220100011093. The next prime is 21220100011141. The reversal of 21220100011100 is 111000102212.

It is a congruent 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, 1343036405 + ... + 1343052204.

It is an arithmetic number, because the mean of its divisors is an integer number (1295291618600).

Almost surely, 2^{21220100011100} is an apocalyptic number.

21220100011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220100011100 is an abundant number, since it is smaller than the sum of its proper divisors (25410398258500).

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

21220100011100 is a wasteful number, since it uses less digits than its factorization.

21220100011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686088702 (or 2686088695 counting only the distinct ones).

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

Adding to 21220100011100 its reverse (111000102212), we get a palindrome (21331100113312).

The spelling of 21220100011100 in words is "twenty-one trillion, two hundred twenty billion, one hundred million, eleven thousand, one hundred".