2131203312 has 120 divisors (see below), whose sum is σ = 7069019776. Its totient is φ = 608907456.

The previous prime is 2131203307. The next prime is 2131203337. The reversal of 2131203312 is 2133021312.

2131203312 is a `hidden beast` number, since 21 + 312 + 0 + 331 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11938 + ... + 66369.

Almost surely, 2^2131203312 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 2131203312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3534509888).

2131203312 is an abundant number, since it is smaller than the sum of its proper divisors (4937816464).

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

2131203312 is an equidigital number, since it uses as much as digits as its factorization.

2131203312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78337 (or 78319 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2131203312 is about 46164.9576193892. The cubic root of 2131203312 is about 1286.8905965979.

Adding to 2131203312 its reverse (2133021312), we get a palindrome (4264224624).

The spelling of 2131203312 in words is "two billion, one hundred thirty-one million, two hundred three thousand, three hundred twelve".