1312111412 has 6 divisors (see below), whose sum is σ = 2296194978. Its totient is φ = 656055704.

The previous prime is 1312111379. The next prime is 1312111421. The reversal of 1312111412 is 2141112131.

It can be written as a sum of positive squares in only one way, i.e., 1307111716 + 4999696 = 36154^2 + 2236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164013923 + ... + 164013930.

It is an arithmetic number, because the mean of its divisors is an integer number (382699163).

Almost surely, 2^1312111412 is an apocalyptic number.

It is an amenable number.

1312111412 is a deficient number, since it is larger than the sum of its proper divisors (984083566).

1312111412 is a wasteful number, since it uses less digits than its factorization.

1312111412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328027857 (or 328027855 counting only the distinct ones).

The product of its digits is 48, while the sum is 17.

The square root of 1312111412 is about 36223.0784445497. The cubic root of 1312111412 is about 1094.7717216981.

Adding to 1312111412 its reverse (2141112131), we get a palindrome (3453223543).

The spelling of 1312111412 in words is "one billion, three hundred twelve million, one hundred eleven thousand, four hundred twelve".