123401123 has 4 divisors (see below), whose sum is σ = 123523008. Its totient is φ = 123279240.

The previous prime is 123401101. The next prime is 123401149. The reversal of 123401123 is 321104321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321104321 = 7529 ⋅42649.

It is a cyclic number.

It is not a de Polignac number, because 123401123 - 2⁸ = 123400867 is a prime.

It is a super-2 number, since 2×123401123² = 30455674315322258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123401153) 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, 59411 + ... + 61452.

It is an arithmetic number, because the mean of its divisors is an integer number (30880752).

Almost surely, 2^123401123 is an apocalyptic number.

123401123 is a deficient number, since it is larger than the sum of its proper divisors (121885).

123401123 is a wasteful number, since it uses less digits than its factorization.

123401123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121884.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123401123 is about 11108.6058081111. The cubic root of 123401123 is about 497.8590094038.

Adding to 123401123 its reverse (321104321), we get a palindrome (444505444).

The spelling of 123401123 in words is "one hundred twenty-three million, four hundred one thousand, one hundred twenty-three".