321612123 has 8 divisors (see below), whose sum is σ = 490075648. Its totient is φ = 183778344.

The previous prime is 321612121. The next prime is 321612131. The reversal of 321612123 is 321216123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321612123 - 2¹ = 321612121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 15314863 = 321612123 / (3 + 2 + 1 + 6 + 1 + 2 + 1 + 2 + 3).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321612123.

It is not an unprimeable number, because it can be changed into a prime (321612121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7657411 + ... + 7657452.

It is an arithmetic number, because the mean of its divisors is an integer number (61259456).

Almost surely, 2^321612123 is an apocalyptic number.

321612123 is a deficient number, since it is larger than the sum of its proper divisors (168463525).

321612123 is a wasteful number, since it uses less digits than its factorization.

321612123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15314873.

The product of its digits is 432, while the sum is 21.

The square root of 321612123 is about 17933.5474181769. The cubic root of 321612123 is about 685.1370766576.

Adding to 321612123 its reverse (321216123), we get a palindrome (642828246).

The spelling of 321612123 in words is "three hundred twenty-one million, six hundred twelve thousand, one hundred twenty-three".