1312111213212 has 24 divisors (see below), whose sum is σ = 3085699864576. Its totient is φ = 433926542448.

The previous prime is 1312111213211. The next prime is 1312111213213. The reversal of 1312111213212 is 2123121112131.

It is an interprime number because it is at equal distance from previous prime (1312111213211) and next prime (1312111213213).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312111213211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430481158 + ... + 430484205.

Almost surely, 2^{1312111213212} is an apocalyptic number.

1312111213212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312111213212 is an abundant number, since it is smaller than the sum of its proper divisors (1773588651364).

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

1312111213212 is a wasteful number, since it uses less digits than its factorization.

1312111213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860965497 (or 860965495 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

Adding to 1312111213212 its reverse (2123121112131), we get a palindrome (3435232325343).

The spelling of 1312111213212 in words is "one trillion, three hundred twelve billion, one hundred eleven million, two hundred thirteen thousand, two hundred twelve".