123420422533 has 4 divisors (see below), whose sum is σ = 123490829548. Its totient is φ = 123350015520.

The previous prime is 123420422519. The next prime is 123420422557. The reversal of 123420422533 is 335224024321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 335224024321 = 1933 ⋅173421637.

It can be written as a sum of positive squares in 2 ways, for example, as 36068846724 + 87351575809 = 189918^2 + 295553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123420422533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123420422495 and 123420422504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123420422563) 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, 35200878 + ... + 35204383.

It is an arithmetic number, because the mean of its divisors is an integer number (30872707387).

Almost surely, 2^123420422533 is an apocalyptic number.

It is an amenable number.

123420422533 is a deficient number, since it is larger than the sum of its proper divisors (70407015).

123420422533 is an equidigital number, since it uses as much as digits as its factorization.

123420422533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70407014.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 123420422533 its reverse (335224024321), we get a palindrome (458644446854).

The spelling of 123420422533 in words is "one hundred twenty-three billion, four hundred twenty million, four hundred twenty-two thousand, five hundred thirty-three".