121131112 has 32 divisors (see below), whose sum is σ = 231880320. Its totient is φ = 59308480.

The previous prime is 121131077. The next prime is 121131121. The reversal of 121131112 is 211131121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121131092 and 121131101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94218 + ... + 95494.

It is an arithmetic number, because the mean of its divisors is an integer number (7246260).

Almost surely, 2^121131112 is an apocalyptic number.

It is an amenable number.

121131112 is a deficient number, since it is larger than the sum of its proper divisors (110749208).

121131112 is a wasteful number, since it uses less digits than its factorization.

121131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1517 counting only the distinct ones).

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

The square root of 121131112 is about 11005.9580228166. The cubic root of 121131112 is about 494.7873276111.

Adding to 121131112 its reverse (211131121), we get a palindrome (332262233).

Subtracting 121131112 from its reverse (211131121), we obtain a palindrome (90000009).

It can be divided in two parts, 12113 and 1112, that added together give a square (13225 = 115²).

The spelling of 121131112 in words is "one hundred twenty-one million, one hundred thirty-one thousand, one hundred twelve".