123113020312 has 32 divisors (see below), whose sum is σ = 250824499200. Its totient is φ = 56435508000.

The previous prime is 123113020301. The next prime is 123113020339. The reversal of 123113020312 is 213020311321.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 123113020312.

It is a congruent number.

It is an unprimeable number.

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, 13059064 + ... + 13068487.

It is an arithmetic number, because the mean of its divisors is an integer number (7838265600).

Almost surely, 2^123113020312 is an apocalyptic number.

It is an amenable number.

123113020312 is an abundant number, since it is smaller than the sum of its proper divisors (127711478888).

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

123113020312 is a wasteful number, since it uses less digits than its factorization.

123113020312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26127607 (or 26127603 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123113020312 its reverse (213020311321), we get a palindrome (336133331633).

The spelling of 123113020312 in words is "one hundred twenty-three billion, one hundred thirteen million, twenty thousand, three hundred twelve".