123330521 has 4 divisors (see below), whose sum is σ = 123427344. Its totient is φ = 123233700.

The previous prime is 123330517. The next prime is 123330541. The reversal of 123330521 is 125033321.

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: 125033321 = 7 ⋅17861903.

It is a cyclic number.

It is not a de Polignac number, because 123330521 - 2² = 123330517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123330493 and 123330502.

It is not an unprimeable number, because it can be changed into a prime (123330511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46475 + ... + 49056.

It is an arithmetic number, because the mean of its divisors is an integer number (30856836).

Almost surely, 2^123330521 is an apocalyptic number.

It is an amenable number.

123330521 is a deficient number, since it is larger than the sum of its proper divisors (96823).

123330521 is an equidigital number, since it uses as much as digits as its factorization.

123330521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96822.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 123330521 is about 11105.4275469250. The cubic root of 123330521 is about 497.7640439056.

Adding to 123330521 its reverse (125033321), we get a palindrome (248363842).

The spelling of 123330521 in words is "one hundred twenty-three million, three hundred thirty thousand, five hundred twenty-one".