21213320012323 has 2 divisors, whose sum is σ = 21213320012324. Its totient is φ = 21213320012322.

The previous prime is 21213320012317. The next prime is 21213320012351. The reversal of 21213320012323 is 32321002331212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21213320012323 - 2³³ = 21204730077731 is a prime.

It is not a weakly prime, because it can be changed into another prime (21213320012623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606660006161 + 10606660006162.

It is an arithmetic number, because the mean of its divisors is an integer number (10606660006162).

Almost surely, 2^{21213320012323} is an apocalyptic number.

21213320012323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213320012323 is an equidigital number, since it uses as much as digits as its factorization.

21213320012323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21213320012323 its reverse (32321002331212), we get a palindrome (53534322343535).

The spelling of 21213320012323 in words is "twenty-one trillion, two hundred thirteen billion, three hundred twenty million, twelve thousand, three hundred twenty-three".