21230255329 has 2 divisors, whose sum is σ = 21230255330. Its totient is φ = 21230255328.

The previous prime is 21230255303. The next prime is 21230255369. The reversal of 21230255329 is 92355203212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13459480225 + 7770775104 = 116015^2 + 88152^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230255329 - 2¹¹ = 21230253281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21230255294 and 21230255303.

It is not a weakly prime, because it can be changed into another prime (21230255369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615127664 + 10615127665.

It is an arithmetic number, because the mean of its divisors is an integer number (10615127665).

Almost surely, 2^21230255329 is an apocalyptic number.

It is an amenable number.

21230255329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230255329 is an equidigital number, since it uses as much as digits as its factorization.

21230255329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 21230255329 in words is "twenty-one billion, two hundred thirty million, two hundred fifty-five thousand, three hundred twenty-nine".