123111201112 has 8 divisors (see below), whose sum is σ = 230833502100. Its totient is φ = 61555600552.

The previous prime is 123111201097. The next prime is 123111201131. The reversal of 123111201112 is 211102111321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7694450062 + ... + 7694450077.

Almost surely, 2^123111201112 is an apocalyptic number.

It is an amenable number.

123111201112 is a deficient number, since it is larger than the sum of its proper divisors (107722300988).

123111201112 is a wasteful number, since it uses less digits than its factorization.

123111201112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15388900145 (or 15388900141 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 123111201112 its reverse (211102111321), we get a palindrome (334213312433).

The spelling of 123111201112 in words is "one hundred twenty-three billion, one hundred eleven million, two hundred one thousand, one hundred twelve".