121311112 has 16 divisors (see below), whose sum is σ = 244955340. Its totient is φ = 55989696.

The previous prime is 121311103. The next prime is 121311121. The reversal of 121311112 is 211113121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121311103) and next prime (121311121).

It can be written as a sum of positive squares in 2 ways, for example, as 121308196 + 2916 = 11014^2 + 54^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 121311092 and 121311101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583123 + ... + 583330.

Almost surely, 2^121311112 is an apocalyptic number.

It is an amenable number.

121311112 is an abundant number, since it is smaller than the sum of its proper divisors (123644228).

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

121311112 is a wasteful number, since it uses less digits than its factorization.

121311112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166472 (or 1166468 counting only the distinct ones).

The product of its digits is 12, while the sum is 13.

The square root of 121311112 is about 11014.1323761793. The cubic root of 121311112 is about 495.0322898366.

Adding to 121311112 its reverse (211113121), we get a palindrome (332424233).

The spelling of 121311112 in words is "one hundred twenty-one million, three hundred eleven thousand, one hundred twelve".