121231111112 has 16 divisors (see below), whose sum is σ = 227515558860. Its totient is φ = 60560295424.

The previous prime is 121231111087. The next prime is 121231111117. The reversal of 121231111112 is 211111132121.

It can be written as a sum of positive squares in 2 ways, for example, as 104648368036 + 16582743076 = 323494^2 + 128774^2 .

It is not an unprimeable number, because it can be changed into a prime (121231111117) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 6898193 + ... + 6915744.

Almost surely, 2^121231111112 is an apocalyptic number.

It is an amenable number.

121231111112 is a deficient number, since it is larger than the sum of its proper divisors (106284447748).

121231111112 is a wasteful number, since it uses less digits than its factorization.

121231111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13815040 (or 13815036 counting only the distinct ones).

The product of its digits is 24, while the sum is 17.

Adding to 121231111112 its reverse (211111132121), we get a palindrome (332342243233).

The spelling of 121231111112 in words is "one hundred twenty-one billion, two hundred thirty-one million, one hundred eleven thousand, one hundred twelve".