123221424433 has 4 divisors (see below), whose sum is σ = 123587066980. Its totient is φ = 122855781888.

The previous prime is 123221424407. The next prime is 123221424457. The reversal of 123221424433 is 334424122321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 334424122321 = 61 ⋅5482362661.

It can be written as a sum of positive squares in 2 ways, for example, as 23369848384 + 99851576049 = 152872^2 + 315993^2 .

It is a cyclic number.

It is not a de Polignac number, because 123221424433 - 2⁵ = 123221424401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123221424395 and 123221424404.

It is not an unprimeable number, because it can be changed into a prime (123221424463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182820768 + ... + 182821441.

It is an arithmetic number, because the mean of its divisors is an integer number (30896766745).

Almost surely, 2^123221424433 is an apocalyptic number.

It is an amenable number.

123221424433 is a deficient number, since it is larger than the sum of its proper divisors (365642547).

123221424433 is an equidigital number, since it uses as much as digits as its factorization.

123221424433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365642546.

The product of its digits is 27648, while the sum is 31.

Adding to 123221424433 its reverse (334424122321), we get a palindrome (457645546754).

The spelling of 123221424433 in words is "one hundred twenty-three billion, two hundred twenty-one million, four hundred twenty-four thousand, four hundred thirty-three".