21212102302321 has 32 divisors (see below), whose sum is σ = 25078440665088. Its totient is φ = 17557327307520.

The previous prime is 21212102302319. The next prime is 21212102302333. The reversal of 21212102302321 is 12320320121212.

It is not a de Polignac number, because 21212102302321 - 2¹ = 21212102302319 is a prime.

It is a super-3 number, since 3×21212102302321³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21212102302292 and 21212102302301.

It is not an unprimeable number, because it can be changed into a prime (21212102302301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380165001 + ... + 380220793.

It is an arithmetic number, because the mean of its divisors is an integer number (783701270784).

Almost surely, 2^{21212102302321} is an apocalyptic number.

It is an amenable number.

21212102302321 is a deficient number, since it is larger than the sum of its proper divisors (3866338362767).

21212102302321 is a wasteful number, since it uses less digits than its factorization.

21212102302321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59581.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21212102302321 its reverse (12320320121212), we get a palindrome (33532422423533).

The spelling of 21212102302321 in words is "twenty-one trillion, two hundred twelve billion, one hundred two million, three hundred two thousand, three hundred twenty-one".