2131323203212 has 96 divisors (see below), whose sum is σ = 4370274736128. Its totient is φ = 890517771264.

The previous prime is 2131323203173. The next prime is 2131323203213. The reversal of 2131323203212 is 2123023231312.

It is not an unprimeable number, because it can be changed into a prime (2131323203213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 654380688 + ... + 654383944.

It is an arithmetic number, because the mean of its divisors is an integer number (45523695168).

Almost surely, 2^{2131323203212} 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 2131323203212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2185137368064).

2131323203212 is an abundant number, since it is smaller than the sum of its proper divisors (2238951532916).

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

2131323203212 is a wasteful number, since it uses less digits than its factorization.

2131323203212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095 (or 5093 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 2131323203212 its reverse (2123023231312), we get a palindrome (4254346434524).

The spelling of 2131323203212 in words is "two trillion, one hundred thirty-one billion, three hundred twenty-three million, two hundred three thousand, two hundred twelve".