123120113212 has 24 divisors (see below), whose sum is σ = 221468231376. Its totient is φ = 59864034048.

The previous prime is 123120113203. The next prime is 123120113257. The reversal of 123120113212 is 212311021321.

It is a self number, because there is not a number n which added to its sum of digits gives 123120113212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2545758 + ... + 2593669.

It is an arithmetic number, because the mean of its divisors is an integer number (9227842974).

Almost surely, 2^123120113212 is an apocalyptic number.

It is an amenable number.

123120113212 is a deficient number, since it is larger than the sum of its proper divisors (98348118164).

123120113212 is a wasteful number, since it uses less digits than its factorization.

123120113212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139597 (or 5139595 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123120113212 its reverse (212311021321), we get a palindrome (335431134533).

The spelling of 123120113212 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred thirteen thousand, two hundred twelve".