1001312112 has 20 divisors (see below), whose sum is σ = 2586723080. Its totient is φ = 333770688.

The previous prime is 1001312089. The next prime is 1001312171. The reversal of 1001312112 is 2112131001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10430287 + ... + 10430382.

It is an arithmetic number, because the mean of its divisors is an integer number (129336154).

Almost surely, 2^1001312112 is an apocalyptic number.

1001312112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001312112 is an abundant number, since it is smaller than the sum of its proper divisors (1585410968).

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

1001312112 is a wasteful number, since it uses less digits than its factorization.

1001312112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20860680 (or 20860674 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1001312112 is about 31643.5161130997. The cubic root of 1001312112 is about 1000.4371795129.

Adding to 1001312112 its reverse (2112131001), we get a palindrome (3113443113).

The spelling of 1001312112 in words is "one billion, one million, three hundred twelve thousand, one hundred twelve".