123330021013 has 4 divisors (see below), whose sum is σ = 126338070348. Its totient is φ = 120321971680.

The previous prime is 123330021011. The next prime is 123330021019. The reversal of 123330021013 is 310120033321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42823335844 + 80506685169 = 206938^2 + 283737^2 .

It is a cyclic number.

It is not a de Polignac number, because 123330021013 - 2¹ = 123330021011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123330021011) 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, 1504024606 + ... + 1504024687.

It is an arithmetic number, because the mean of its divisors is an integer number (31584517587).

Almost surely, 2^123330021013 is an apocalyptic number.

It is an amenable number.

123330021013 is a deficient number, since it is larger than the sum of its proper divisors (3008049335).

123330021013 is an equidigital number, since it uses as much as digits as its factorization.

123330021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008049334.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 123330021013 its reverse (310120033321), we get a palindrome (433450054334).

The spelling of 123330021013 in words is "one hundred twenty-three billion, three hundred thirty million, twenty-one thousand, thirteen".