1210320111312 has 120 divisors (see below), whose sum is σ = 3661232277248. Its totient is φ = 371031840000.

The previous prime is 1210320111281. The next prime is 1210320111331. The reversal of 1210320111312 is 2131110230121.

1210320111312 is a `hidden beast` number, since 1 + 21 + 0 + 320 + 1 + 11 + 312 = 666.

It is a super-2 number, since 2×1210320111312² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 685564 + ... + 1700187.

Almost surely, 2^{1210320111312} is an apocalyptic number.

1210320111312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1210320111312 is an abundant number, since it is smaller than the sum of its proper divisors (2450912165936).

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

1210320111312 is a wasteful number, since it uses less digits than its factorization.

1210320111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386049 (or 2386040 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1210320111312 its reverse (2131110230121), we get a palindrome (3341430341433).

The spelling of 1210320111312 in words is "one trillion, two hundred ten billion, three hundred twenty million, one hundred eleven thousand, three hundred twelve".