123100401 has 4 divisors (see below), whose sum is σ = 164133872. Its totient is φ = 82066932.

The previous prime is 123100387. The next prime is 123100423. The reversal of 123100401 is 104001321.

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 not a de Polignac number, because 123100401 - 2¹⁰ = 123099377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123100441) 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, 20516731 + ... + 20516736.

It is an arithmetic number, because the mean of its divisors is an integer number (41033468).

Almost surely, 2^123100401 is an apocalyptic number.

It is an amenable number.

123100401 is a deficient number, since it is larger than the sum of its proper divisors (41033471).

123100401 is an equidigital number, since it uses as much as digits as its factorization.

123100401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41033470.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 123100401 is about 11095.0620097411. The cubic root of 123100401 is about 497.4542617648.

Adding to 123100401 its reverse (104001321), we get a palindrome (227101722).

The spelling of 123100401 in words is "one hundred twenty-three million, one hundred thousand, four hundred one".