121112112123 has 24 divisors (see below), whose sum is σ = 180005295600. Its totient is φ = 78433617600.

The previous prime is 121112112109. The next prime is 121112112127. The reversal of 121112112123 is 321211211121.

It is a happy number.

It is not a de Polignac number, because 121112112123 - 2⁸ = 121112111867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121112112096 and 121112112105.

It is not an unprimeable number, because it can be changed into a prime (121112112127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1208773 + ... + 1305126.

It is an arithmetic number, because the mean of its divisors is an integer number (7500220650).

Almost surely, 2^121112112123 is an apocalyptic number.

121112112123 is a deficient number, since it is larger than the sum of its proper divisors (58893183477).

121112112123 is a wasteful number, since it uses less digits than its factorization.

121112112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514059 (or 2514056 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 121112112123 its reverse (321211211121), we get a palindrome (442323323244).

The spelling of 121112112123 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-three".