321123012 has 48 divisors (see below), whose sum is σ = 862108800. Its totient is φ = 91130112.

The previous prime is 321123007. The next prime is 321123067. The reversal of 321123012 is 210321123.

It is a junction number, because it is equal to n+sod(n) for n = 321122982 and 321123000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313 + ... + 25344.

It is an arithmetic number, because the mean of its divisors is an integer number (17960600).

Almost surely, 2^321123012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321123012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431054400).

321123012 is an abundant number, since it is smaller than the sum of its proper divisors (540985788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321123012 is a wasteful number, since it uses less digits than its factorization.

321123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25820 (or 25818 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 321123012 is about 17919.9054685007. The cubic root of 321123012 is about 684.7895792852.

Adding to 321123012 its reverse (210321123), we get a palindrome (531444135).

The spelling of 321123012 in words is "three hundred twenty-one million, one hundred twenty-three thousand, twelve".