123210212329 has 4 divisors (see below), whose sum is σ = 123288841984. Its totient is φ = 123131582676.

The previous prime is 123210212327. The next prime is 123210212347. The reversal of 123210212329 is 923212012321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 923212012321 = 511909 ⋅1803469.

It is a cyclic number.

It is not a de Polignac number, because 123210212329 - 2¹ = 123210212327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123210212297 and 123210212306.

It is not an unprimeable number, because it can be changed into a prime (123210212327) 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 in 3 ways as a sum of consecutive naturals, for example, 39312477 + ... + 39315610.

It is an arithmetic number, because the mean of its divisors is an integer number (30822210496).

Almost surely, 2^123210212329 is an apocalyptic number.

It is an amenable number.

123210212329 is a deficient number, since it is larger than the sum of its proper divisors (78629655).

123210212329 is an equidigital number, since it uses as much as digits as its factorization.

123210212329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78629654.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 123210212329 in words is "one hundred twenty-three billion, two hundred ten million, two hundred twelve thousand, three hundred twenty-nine".