123404201201 has 4 divisors (see below), whose sum is σ = 124496273892. Its totient is φ = 122312128512.

The previous prime is 123404201177. The next prime is 123404201233. The reversal of 123404201201 is 102102404321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102102404321 = 20407 ⋅5003303.

It can be written as a sum of positive squares in 2 ways, for example, as 44217678400 + 79186522801 = 210280^2 + 281401^2 .

It is a cyclic number.

It is not a de Polignac number, because 123404201201 - 2¹⁰ = 123404200177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123404201281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546036176 + ... + 546036401.

It is an arithmetic number, because the mean of its divisors is an integer number (31124068473).

Almost surely, 2^123404201201 is an apocalyptic number.

It is an amenable number.

123404201201 is a deficient number, since it is larger than the sum of its proper divisors (1092072691).

123404201201 is a wasteful number, since it uses less digits than its factorization.

123404201201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092072690.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 123404201201 its reverse (102102404321), we get a palindrome (225506605522).

The spelling of 123404201201 in words is "one hundred twenty-three billion, four hundred four million, two hundred one thousand, two hundred one".