123321440212 has 6 divisors (see below), whose sum is σ = 215812520378. Its totient is φ = 61660720104.

The previous prime is 123321440201. The next prime is 123321440213. The reversal of 123321440212 is 212044123321.

123321440212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 122994698436 + 326741776 = 350706^2 + 18076^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123321440213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15415180023 + ... + 15415180030.

Almost surely, 2^123321440212 is an apocalyptic number.

It is an amenable number.

123321440212 is a deficient number, since it is larger than the sum of its proper divisors (92491080166).

123321440212 is a wasteful number, since it uses less digits than its factorization.

123321440212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30830360057 (or 30830360055 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 123321440212 its reverse (212044123321), we get a palindrome (335365563533).

The spelling of 123321440212 in words is "one hundred twenty-three billion, three hundred twenty-one million, four hundred forty thousand, two hundred twelve".