321123000000 has 784 divisors, whose sum is σ = 1194419711232. Its totient is φ = 75456000000.

The previous prime is 321122999917. The next prime is 321123000017. The reversal of 321123000000 is 321123.

It is a happy number.

It is a super-2 number, since 2×321123000000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 321123000000.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1220999869 + ... + 1221000131.

Almost surely, 2^321123000000 is an apocalyptic number.

321123000000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321123000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597209855616).

321123000000 is an abundant number, since it is smaller than the sum of its proper divisors (873296711232).

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

321123000000 is an equidigital number, since it uses as much as digits as its factorization.

321123000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 321123000000 its reverse (321123), we get a palindrome (321123321123).

321123000000 divided by its reverse (321123) gives a 6-th power (1000000 = 10⁶).

It can be divided in two parts, 321 and 123000000, that added together give a palindrome (123000321).

The spelling of 321123000000 in words is "three hundred twenty-one billion, one hundred twenty-three million", and thus it is an aban number.