123134400321 has 4 divisors (see below), whose sum is σ = 164179200432. Its totient is φ = 82089600212.

The previous prime is 123134400281. The next prime is 123134400343. The reversal of 123134400321 is 123004431321.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 123134400321 - 2²⁷ = 123000182593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123134400291 and 123134400300.

It is not an unprimeable number, because it can be changed into a prime (123130400321) 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, 20522400051 + ... + 20522400056.

It is an arithmetic number, because the mean of its divisors is an integer number (41044800108).

Almost surely, 2^123134400321 is an apocalyptic number.

It is an amenable number.

123134400321 is a deficient number, since it is larger than the sum of its proper divisors (41044800111).

123134400321 is an equidigital number, since it uses as much as digits as its factorization.

123134400321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41044800110.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 123134400321 its reverse (123004431321), we get a palindrome (246138831642).

The spelling of 123134400321 in words is "one hundred twenty-three billion, one hundred thirty-four million, four hundred thousand, three hundred twenty-one".