1312223100012 has 192 divisors, whose sum is σ = 3757585305600. Its totient is φ = 392705832960.

The previous prime is 1312223099959. The next prime is 1312223100031. The reversal of 1312223100012 is 2100013222131.

1312223100012 is a `hidden beast` number, since 131 + 222 + 310 + 0 + 0 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55186158 + ... + 55209930.

It is an arithmetic number, because the mean of its divisors is an integer number (19570756800).

Almost surely, 2^{1312223100012} is an apocalyptic number.

1312223100012 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 1312223100012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878792652800).

1312223100012 is an abundant number, since it is smaller than the sum of its proper divisors (2445362205588).

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

1312223100012 is a wasteful number, since it uses less digits than its factorization.

1312223100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24373 (or 24365 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1312223100012 its reverse (2100013222131), we get a palindrome (3412236322143).

The spelling of 1312223100012 in words is "one trillion, three hundred twelve billion, two hundred twenty-three million, one hundred thousand, twelve".