1312001112 has 64 divisors (see below), whose sum is σ = 3477427200. Its totient is φ = 411077120.

The previous prime is 1312001057. The next prime is 1312001137. The reversal of 1312001112 is 2111002131.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419089 + ... + 422207.

It is an arithmetic number, because the mean of its divisors is an integer number (54334800).

Almost surely, 2^1312001112 is an apocalyptic number.

1312001112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312001112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738713600).

1312001112 is an abundant number, since it is smaller than the sum of its proper divisors (2165426088).

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

1312001112 is a wasteful number, since it uses less digits than its factorization.

1312001112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176 (or 4172 counting only the distinct ones).

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

The square root of 1312001112 is about 36221.5559025285. Note that the first 3 decimals coincide. The cubic root of 1312001112 is about 1094.7410442461.

Adding to 1312001112 its reverse (2111002131), we get a palindrome (3423003243).

The spelling of 1312001112 in words is "one billion, three hundred twelve million, one thousand, one hundred twelve".