123243013212 has 24 divisors (see below), whose sum is σ = 313709488512. Its totient is φ = 37346367600.

The previous prime is 123243013211. The next prime is 123243013247. The reversal of 123243013212 is 212310342321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123243013211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466829464 + ... + 466829727.

It is an arithmetic number, because the mean of its divisors is an integer number (13071228688).

Almost surely, 2^123243013212 is an apocalyptic number.

123243013212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123243013212 is an abundant number, since it is smaller than the sum of its proper divisors (190466475300).

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

123243013212 is a wasteful number, since it uses less digits than its factorization.

123243013212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933659209 (or 933659207 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 123243013212 its reverse (212310342321), we get a palindrome (335553355533).

The spelling of 123243013212 in words is "one hundred twenty-three billion, two hundred forty-three million, thirteen thousand, two hundred twelve".