1234131555312 has 120 divisors (see below), whose sum is σ = 3586238323200. Its totient is φ = 395714855424.

The previous prime is 1234131555299. The next prime is 1234131555313. The reversal of 1234131555312 is 2135551314321.

It is a happy number.

1234131555312 is a `hidden beast` number, since 1 + 2 + 3 + 41 + 31 + 55 + 531 + 2 = 666.

It is a super-2 number, since 2×1234131555312² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234131555313) 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, 574033 + ... + 1672655.

It is an arithmetic number, because the mean of its divisors is an integer number (29885319360).

Almost surely, 2^{1234131555312} is an apocalyptic number.

1234131555312 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 1234131555312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1793119161600).

1234131555312 is an abundant number, since it is smaller than the sum of its proper divisors (2352106767888).

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

1234131555312 is a wasteful number, since it uses less digits than its factorization.

1234131555312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098935 (or 1098926 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

Adding to 1234131555312 its reverse (2135551314321), we get a palindrome (3369682869633).

The spelling of 1234131555312 in words is "one trillion, two hundred thirty-four billion, one hundred thirty-one million, five hundred fifty-five thousand, three hundred twelve".