2131113221312 has 56 divisors (see below), whose sum is σ = 4321188492480. Its totient is φ = 1042333798400.

The previous prime is 2131113221311. The next prime is 2131113221351. The reversal of 2131113221312 is 2131223111312.

It is a happy number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (2131113221311) 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, 5531864 + ... + 5904552.

Almost surely, 2^{2131113221312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131113221312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2160594246240).

2131113221312 is an abundant number, since it is smaller than the sum of its proper divisors (2190075271168).

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

2131113221312 is a wasteful number, since it uses less digits than its factorization.

2131113221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374649 (or 374639 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

Adding to 2131113221312 its reverse (2131223111312), we get a palindrome (4262336332624).

The spelling of 2131113221312 in words is "two trillion, one hundred thirty-one billion, one hundred thirteen million, two hundred twenty-one thousand, three hundred twelve".