123313421123 has 4 divisors (see below), whose sum is σ = 124130066448. Its totient is φ = 122496775800.

The previous prime is 123313421113. The next prime is 123313421129. The reversal of 123313421123 is 321124313321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123313421123 - 2⁴ = 123313421107 is a prime.

It is a super-2 number, since 2×123313421123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123313421092 and 123313421101.

It is not an unprimeable number, because it can be changed into a prime (123313421129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408322436 + ... + 408322737.

It is an arithmetic number, because the mean of its divisors is an integer number (31032516612).

Almost surely, 2^123313421123 is an apocalyptic number.

123313421123 is a deficient number, since it is larger than the sum of its proper divisors (816645325).

123313421123 is an equidigital number, since it uses as much as digits as its factorization.

123313421123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816645324.

The product of its digits is 2592, while the sum is 26.

Adding to 123313421123 its reverse (321124313321), we get a palindrome (444437734444).

The spelling of 123313421123 in words is "one hundred twenty-three billion, three hundred thirteen million, four hundred twenty-one thousand, one hundred twenty-three".