13131112 has 8 divisors (see below), whose sum is σ = 24620850. Its totient is φ = 6565552.

The previous prime is 13131103. The next prime is 13131127. The reversal of 13131112 is 21113131.

It can be written as a sum of positive squares in only one way, i.e., 8491396 + 4639716 = 2914^2 + 2154^2 .

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

It is a super-2 number, since 2×13131112² = 344852204713088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13131092 and 13131101.

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 as a sum of consecutive naturals, namely, 820687 + ... + 820702.

Almost surely, 2^13131112 is an apocalyptic number.

It is an amenable number.

13131112 is a deficient number, since it is larger than the sum of its proper divisors (11489738).

13131112 is a wasteful number, since it uses less digits than its factorization.

13131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641395 (or 1641391 counting only the distinct ones).

The product of its digits is 18, while the sum is 13.

The square root of 13131112 is about 3623.6876245063. The cubic root of 13131112 is about 235.9213086297.

Adding to 13131112 its reverse (21113131), we get a palindrome (34244243).

The spelling of 13131112 in words is "thirteen million, one hundred thirty-one thousand, one hundred twelve".