1312111211320 has 128 divisors (see below), whose sum is σ = 3665695098240. Its totient is φ = 411586560000.

The previous prime is 1312111211267. The next prime is 1312111211353. The reversal of 1312111211320 is 231121112131.

It is a super-2 number, since 2×1312111211320² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1183681 + ... + 2006320.

It is an arithmetic number, because the mean of its divisors is an integer number (28638242955).

Almost surely, 2^{1312111211320} is an apocalyptic number.

1312111211320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312111211320 is an abundant number, since it is smaller than the sum of its proper divisors (2353583886920).

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

1312111211320 is a wasteful number, since it uses less digits than its factorization.

1312111211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3190145 (or 3190141 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1312111211320 its reverse (231121112131), we get a palindrome (1543232323451).

The spelling of 1312111211320 in words is "one trillion, three hundred twelve billion, one hundred eleven million, two hundred eleven thousand, three hundred twenty".