123331030121 has 6 divisors (see below), whose sum is σ = 133547802030. Its totient is φ = 113844027648.

The previous prime is 123331030117. The next prime is 123331030129. The reversal of 123331030121 is 121030133321.

It can be written as a sum of positive squares in 3 ways, for example, as 15854587225 + 107476442896 = 125915^2 + 327836^2 .

It is not a de Polignac number, because 123331030121 - 2² = 123331030117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123331030093 and 123331030102.

It is not an unprimeable number, because it can be changed into a prime (123331030129) 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 5 ways as a sum of consecutive naturals, for example, 364884536 + ... + 364884873.

It is an arithmetic number, because the mean of its divisors is an integer number (22257967005).

Almost surely, 2^123331030121 is an apocalyptic number.

It is an amenable number.

123331030121 is a deficient number, since it is larger than the sum of its proper divisors (10216771909).

123331030121 is an equidigital number, since it uses as much as digits as its factorization.

123331030121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729769435 (or 729769422 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 123331030121 its reverse (121030133321), we get a palindrome (244361163442).

The spelling of 123331030121 in words is "one hundred twenty-three billion, three hundred thirty-one million, thirty thousand, one hundred twenty-one".