123330351621 has 4 divisors (see below), whose sum is σ = 164440468832. Its totient is φ = 82220234412.

The previous prime is 123330351619. The next prime is 123330351631. The reversal of 123330351621 is 126153033321.

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.

It is not a de Polignac number, because 123330351621 - 2¹ = 123330351619 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 (123330351601) 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, 20555058601 + ... + 20555058606.

It is an arithmetic number, because the mean of its divisors is an integer number (41110117208).

Almost surely, 2^123330351621 is an apocalyptic number.

It is an amenable number.

123330351621 is a deficient number, since it is larger than the sum of its proper divisors (41110117211).

123330351621 is an equidigital number, since it uses as much as digits as its factorization.

123330351621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41110117210.

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 123330351621 its reverse (126153033321), we get a palindrome (249483384942).

The spelling of 123330351621 in words is "one hundred twenty-three billion, three hundred thirty million, three hundred fifty-one thousand, six hundred twenty-one".