21100310033333 has 12 divisors (see below), whose sum is σ = 21207755593284. Its totient is φ = 20993359833600.

The previous prime is 21100310033323. The next prime is 21100310033339. The reversal of 21100310033333 is 33333001300112.

It can be written as a sum of positive squares in 6 ways, for example, as 189014518564 + 20911295514769 = 434758^2 + 4572887^2 .

It is not a de Polignac number, because 21100310033333 - 2⁴ = 21100310033317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21100310033299 and 21100310033308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100310033339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51991085 + ... + 52395357.

It is an arithmetic number, because the mean of its divisors is an integer number (1767312966107).

Almost surely, 2^{21100310033333} is an apocalyptic number.

It is an amenable number.

21100310033333 is a deficient number, since it is larger than the sum of its proper divisors (107445559951).

21100310033333 is an frugal number, since it uses more digits than its factorization.

21100310033333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405496 (or 405215 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 21100310033333 its reverse (33333001300112), we get a palindrome (54433311333445).

The spelling of 21100310033333 in words is "twenty-one trillion, one hundred billion, three hundred ten million, thirty-three thousand, three hundred thirty-three".