2123031312 has 120 divisors (see below), whose sum is σ = 6101281368. Its totient is φ = 688896000.

The previous prime is 2123031283. The next prime is 2123031341. The reversal of 2123031312 is 2131303212.

It is an interprime number because it is at equal distance from previous prime (2123031283) and next prime (2123031341).

It can be written as a sum of positive squares in 4 ways, for example, as 8503056 + 2114528256 = 2916^2 + 45984^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 885988 + ... + 888380.

Almost surely, 2^2123031312 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 2123031312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3050640684).

2123031312 is an abundant number, since it is smaller than the sum of its proper divisors (3978250056).

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

2123031312 is a wasteful number, since it uses less digits than its factorization.

2123031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569 (or 2560 counting only the distinct ones).

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

The square root of 2123031312 is about 46076.3639190420. The cubic root of 2123031312 is about 1285.2436490351.

Adding to 2123031312 its reverse (2131303212), we get a palindrome (4254334524).

The spelling of 2123031312 in words is "two billion, one hundred twenty-three million, thirty-one thousand, three hundred twelve".