21021113223100 has 18 divisors (see below), whose sum is σ = 45615815694344. Its totient is φ = 8408445289200.

The previous prime is 21021113223083. The next prime is 21021113223127. The reversal of 21021113223100 is 132231112012.

It is a super-2 number, since 2×21021113223100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105105566016 + ... + 105105566215.

Almost surely, 2^{21021113223100} is an apocalyptic number.

21021113223100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021113223100 is an abundant number, since it is smaller than the sum of its proper divisors (24594702471244).

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

21021113223100 is a wasteful number, since it uses less digits than its factorization.

21021113223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210211132245 (or 210211132238 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21021113223100 its reverse (132231112012), we get a palindrome (21153344335112).

The spelling of 21021113223100 in words is "twenty-one trillion, twenty-one billion, one hundred thirteen million, two hundred twenty-three thousand, one hundred".