21044100221313 has 32 divisors (see below), whose sum is σ = 31193052011520. Its totient is φ = 12532010584320.

The previous prime is 21044100221267. The next prime is 21044100221323. The reversal of 21044100221313 is 31312200144012.

It is not a de Polignac number, because 21044100221313 - 2⁴⁴ = 3451914176897 is a prime.

It is a super-3 number, since 3×21044100221313³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21044100221323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34503595 + ... + 35108207.

It is an arithmetic number, because the mean of its divisors is an integer number (974782875360).

Almost surely, 2^{21044100221313} is an apocalyptic number.

It is an amenable number.

21044100221313 is a deficient number, since it is larger than the sum of its proper divisors (10148951790207).

21044100221313 is a wasteful number, since it uses less digits than its factorization.

21044100221313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633449.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21044100221313 its reverse (31312200144012), we get a palindrome (52356300365325).

The spelling of 21044100221313 in words is "twenty-one trillion, forty-four billion, one hundred million, two hundred twenty-one thousand, three hundred thirteen".