321200123 has 4 divisors (see below), whose sum is σ = 325070088. Its totient is φ = 317330160.

The previous prime is 321200119. The next prime is 321200137. The reversal of 321200123 is 321002123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321002123 = 13 ⋅24692471.

It is a cyclic number.

It is not a de Polignac number, because 321200123 - 2² = 321200119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321200098 and 321200107.

It is not an unprimeable number, because it can be changed into a prime (321200323) 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, 1934858 + ... + 1935023.

It is an arithmetic number, because the mean of its divisors is an integer number (81267522).

Almost surely, 2^321200123 is an apocalyptic number.

321200123 is a deficient number, since it is larger than the sum of its proper divisors (3869965).

321200123 is an equidigital number, since it uses as much as digits as its factorization.

321200123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869964.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 321200123 is about 17922.0568853020. The cubic root of 321200123 is about 684.8443875479.

Adding to 321200123 its reverse (321002123), we get a palindrome (642202246).

The spelling of 321200123 in words is "three hundred twenty-one million, two hundred thousand, one hundred twenty-three".