21323013303213 has 48 divisors (see below), whose sum is σ = 33231517942896. Its totient is φ = 13124916879360.

The previous prime is 21323013303211. The next prime is 21323013303259. The reversal of 21323013303213 is 31230331032312.

21323013303213 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 3 + 0 + 1 + 330 + 321 + 3 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2149150136004 + 19173863167209 = 1465998^2 + 4378797^2 .

It is not a de Polignac number, because 21323013303213 - 2¹ = 21323013303211 is a prime.

It is a super-2 number, since 2×21323013303213² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323013303211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60487681 + ... + 60839177.

It is an arithmetic number, because the mean of its divisors is an integer number (692323290477).

Almost surely, 2^{21323013303213} is an apocalyptic number.

It is an amenable number.

21323013303213 is a deficient number, since it is larger than the sum of its proper divisors (11908504639683).

21323013303213 is a wasteful number, since it uses less digits than its factorization.

21323013303213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359054 (or 359051 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 21323013303213 its reverse (31230331032312), we get a palindrome (52553344335525).

The spelling of 21323013303213 in words is "twenty-one trillion, three hundred twenty-three billion, thirteen million, three hundred three thousand, two hundred thirteen".