123103111312 has 40 divisors (see below), whose sum is σ = 242800570880. Its totient is φ = 60448049280.

The previous prime is 123103111303. The next prime is 123103111319. The reversal of 123103111312 is 213111301321.

It is a super-2 number, since 2×123103111312² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123103111312.

It is not an unprimeable number, because it can be changed into a prime (123103111319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529489 + ... + 725647.

It is an arithmetic number, because the mean of its divisors is an integer number (6070014272).

Almost surely, 2^123103111312 is an apocalyptic number.

It is an amenable number.

123103111312 is a deficient number, since it is larger than the sum of its proper divisors (119697459568).

123103111312 is a wasteful number, since it uses less digits than its factorization.

123103111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196871 (or 196865 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 123103111312 its reverse (213111301321), we get a palindrome (336214412633).

The spelling of 123103111312 in words is "one hundred twenty-three billion, one hundred three million, one hundred eleven thousand, three hundred twelve".