2102131312 has 20 divisors (see below), whose sum is σ = 4081057000. Its totient is φ = 1048955328.

The previous prime is 2102131271. The next prime is 2102131313. The reversal of 2102131312 is 2131312012.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102131313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123663 + ... + 139630.

It is an arithmetic number, because the mean of its divisors is an integer number (204052850).

Almost surely, 2^2102131312 is an apocalyptic number.

It is an amenable number.

2102131312 is a deficient number, since it is larger than the sum of its proper divisors (1978925688).

2102131312 is a wasteful number, since it uses less digits than its factorization.

2102131312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263800 (or 263794 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2102131312 is about 45849.0055726403. The cubic root of 2102131312 is about 1281.0122429121.

Adding to 2102131312 its reverse (2131312012), we get a palindrome (4233443324).

The spelling of 2102131312 in words is "two billion, one hundred two million, one hundred thirty-one thousand, three hundred twelve".