2123021312 has 22 divisors (see below), whose sum is σ = 4243971408. Its totient is φ = 1061510144.

The previous prime is 2123021311. The next prime is 2123021363. The reversal of 2123021312 is 2131203212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123021311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1035608 + ... + 1037655.

Almost surely, 2^2123021312 is an apocalyptic number.

It is an amenable number.

2123021312 is a deficient number, since it is larger than the sum of its proper divisors (2120950096).

2123021312 is an equidigital number, since it uses as much as digits as its factorization.

2123021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073283 (or 2073265 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2123021312 is about 46076.2554034071. The cubic root of 2123021312 is about 1285.2416310940.

Adding to 2123021312 its reverse (2131203212), we get a palindrome (4254224524).

The spelling of 2123021312 in words is "two billion, one hundred twenty-three million, twenty-one thousand, three hundred twelve".