123123101 has 4 divisors (see below), whose sum is σ = 124063104. Its totient is φ = 122183100.

The previous prime is 123123083. The next prime is 123123107. The reversal of 123123101 is 101321321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101321321 = 2179 ⋅46499.

It is a cyclic number.

It is not a de Polignac number, because 123123101 - 2¹⁴ = 123106717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123123107) 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, 469805 + ... + 470066.

It is an arithmetic number, because the mean of its divisors is an integer number (31015776).

Almost surely, 2^123123101 is an apocalyptic number.

It is an amenable number.

123123101 is a deficient number, since it is larger than the sum of its proper divisors (940003).

123123101 is an equidigital number, since it uses as much as digits as its factorization.

123123101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940002.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 123123101 is about 11096.0849401940. The cubic root of 123123101 is about 497.4848371261.

Adding to 123123101 its reverse (101321321), we get a palindrome (224444422).

The spelling of 123123101 in words is "one hundred twenty-three million, one hundred twenty-three thousand, one hundred one".