21230232332321 has 2 divisors, whose sum is σ = 21230232332322. Its totient is φ = 21230232332320.

The previous prime is 21230232332299. The next prime is 21230232332377. The reversal of 21230232332321 is 12323323203212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21213992398225 + 16239934096 = 4605865^2 + 127436^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230232332321 - 2²² = 21230228138017 is a prime.

It is not a weakly prime, because it can be changed into another prime (21230232332921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615116166160 + 10615116166161.

It is an arithmetic number, because the mean of its divisors is an integer number (10615116166161).

Almost surely, 2^{21230232332321} is an apocalyptic number.

It is an amenable number.

21230232332321 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230232332321 is an equidigital number, since it uses as much as digits as its factorization.

21230232332321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 21230232332321 its reverse (12323323203212), we get a palindrome (33553555535533).

The spelling of 21230232332321 in words is "twenty-one trillion, two hundred thirty billion, two hundred thirty-two million, three hundred thirty-two thousand, three hundred twenty-one".