123101231312 has 20 divisors (see below), whose sum is σ = 238515612000. Its totient is φ = 61548815328.

The previous prime is 123101231311. The next prime is 123101231321. The reversal of 123101231312 is 213132101321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123101231311) 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 3 ways as a sum of consecutive naturals, for example, 581189 + ... + 764187.

It is an arithmetic number, because the mean of its divisors is an integer number (11925780600).

Almost surely, 2^123101231312 is an apocalyptic number.

It is an amenable number.

123101231312 is a deficient number, since it is larger than the sum of its proper divisors (115414380688).

123101231312 is a wasteful number, since it uses less digits than its factorization.

123101231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225050 (or 225044 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123101231312 its reverse (213132101321), we get a palindrome (336233332633).

The spelling of 123101231312 in words is "one hundred twenty-three billion, one hundred one million, two hundred thirty-one thousand, three hundred twelve".