1311101231412 has 144 divisors (see below), whose sum is σ = 3585024576000. Its totient is φ = 371833560000.

The previous prime is 1311101231389. The next prime is 1311101231413. The reversal of 1311101231412 is 2141321011131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311101231413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133088287 + ... + 133098137.

It is an arithmetic number, because the mean of its divisors is an integer number (24896004000).

Almost surely, 2^{1311101231412} is an apocalyptic number.

1311101231412 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 1311101231412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792512288000).

1311101231412 is an abundant number, since it is smaller than the sum of its proper divisors (2273923344588).

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

1311101231412 is a wasteful number, since it uses less digits than its factorization.

1311101231412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11522 (or 11513 counting only the distinct ones).

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

Adding to 1311101231412 its reverse (2141321011131), we get a palindrome (3452422242543).

The spelling of 1311101231412 in words is "one trillion, three hundred eleven billion, one hundred one million, two hundred thirty-one thousand, four hundred twelve".