21232310023213 has 2 divisors, whose sum is σ = 21232310023214. Its totient is φ = 21232310023212.

The previous prime is 21232310023189. The next prime is 21232310023217. The reversal of 21232310023213 is 31232001323212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19421490348324 + 1810819674889 = 4406982^2 + 1345667^2 .

It is a cyclic number.

It is not a de Polignac number, because 21232310023213 - 2¹⁷ = 21232309892141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21232310023217) 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 as a sum of consecutive naturals, namely, 10616155011606 + 10616155011607.

It is an arithmetic number, because the mean of its divisors is an integer number (10616155011607).

Almost surely, 2^{21232310023213} is an apocalyptic number.

It is an amenable number.

21232310023213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232310023213 is an equidigital number, since it uses as much as digits as its factorization.

21232310023213 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 21232310023213 its reverse (31232001323212), we get a palindrome (52464311346425).

The spelling of 21232310023213 in words is "twenty-one trillion, two hundred thirty-two billion, three hundred ten million, twenty-three thousand, two hundred thirteen".