123223120212 has 48 divisors (see below), whose sum is σ = 305763111360. Its totient is φ = 38489405952.

The previous prime is 123223120159. The next prime is 123223120213. The reversal of 123223120212 is 212021322321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123223120213) 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, 1272138 + ... + 1365569.

It is an arithmetic number, because the mean of its divisors is an integer number (6370064820).

Almost surely, 2^123223120212 is an apocalyptic number.

123223120212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123223120212 is an abundant number, since it is smaller than the sum of its proper divisors (182539991148).

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

123223120212 is a wasteful number, since it uses less digits than its factorization.

123223120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637960 (or 2637958 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 123223120212 its reverse (212021322321), we get a palindrome (335244442533).

The spelling of 123223120212 in words is "one hundred twenty-three billion, two hundred twenty-three million, one hundred twenty thousand, two hundred twelve".