1312122210012 has 72 divisors (see below), whose sum is σ = 3406124266272. Its totient is φ = 425642112000.

The previous prime is 1312122210011. The next prime is 1312122210013. The reversal of 1312122210012 is 2100122212131.

It is an interprime number because it is at equal distance from previous prime (1312122210011) and next prime (1312122210013).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312122210011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 516568 + ... + 1700319.

It is an arithmetic number, because the mean of its divisors is an integer number (47307281476).

Almost surely, 2^{1312122210012} is an apocalyptic number.

1312122210012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312122210012 is an abundant number, since it is smaller than the sum of its proper divisors (2094002056260).

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

1312122210012 is a wasteful number, since it uses less digits than its factorization.

1312122210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217339 (or 2217334 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1312122210012 its reverse (2100122212131), we get a palindrome (3412244422143).

The spelling of 1312122210012 in words is "one trillion, three hundred twelve billion, one hundred twenty-two million, two hundred ten thousand, twelve".