123221300312 has 64 divisors (see below), whose sum is σ = 258076316160. Its totient is φ = 54684403200.

The previous prime is 123221300299. The next prime is 123221300317. The reversal of 123221300312 is 213003122321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221300317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547808 + ... + 739280.

It is an arithmetic number, because the mean of its divisors is an integer number (4032442440).

Almost surely, 2^123221300312 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 123221300312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129038158080).

123221300312 is an abundant number, since it is smaller than the sum of its proper divisors (134855015848).

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

123221300312 is a wasteful number, since it uses less digits than its factorization.

123221300312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191664 (or 191660 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123221300312 its reverse (213003122321), we get a palindrome (336224422633).

The spelling of 123221300312 in words is "one hundred twenty-three billion, two hundred twenty-one million, three hundred thousand, three hundred twelve".