21120330313213 has 2 divisors, whose sum is σ = 21120330313214. Its totient is φ = 21120330313212.

The previous prime is 21120330313211. The next prime is 21120330313241. The reversal of 21120330313213 is 31231303302112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20418667764804 + 701662548409 = 4518702^2 + 837653^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120330313213 - 2¹ = 21120330313211 is a prime.

It is a super-3 number, since 3×21120330313213³ (a number of 41 digits) contains 333 as substring.

Together with 21120330313211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120330313211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560165156606 + 10560165156607.

It is an arithmetic number, because the mean of its divisors is an integer number (10560165156607).

Almost surely, 2^{21120330313213} is an apocalyptic number.

It is an amenable number.

21120330313213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120330313213 is an equidigital number, since it uses as much as digits as its factorization.

21120330313213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21120330313213 its reverse (31231303302112), we get a palindrome (52351633615325).

The spelling of 21120330313213 in words is "twenty-one trillion, one hundred twenty billion, three hundred thirty million, three hundred thirteen thousand, two hundred thirteen".