2123213112 has 48 divisors (see below), whose sum is σ = 5807323080. Its totient is φ = 700728000.

The previous prime is 2123213111. The next prime is 2123213137. The reversal of 2123213112 is 2113123212.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123213111) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 138714 + ... + 153257.

Almost surely, 2^2123213112 is an apocalyptic number.

It is an amenable number.

2123213112 is an abundant number, since it is smaller than the sum of its proper divisors (3684109968).

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

2123213112 is a wasteful number, since it uses less digits than its factorization.

2123213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292084 (or 292077 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2123213112 is about 46078.3366887304. The cubic root of 2123213112 is about 1285.2803341003.

Adding to 2123213112 its reverse (2113123212), we get a palindrome (4236336324).

The spelling of 2123213112 in words is "two billion, one hundred twenty-three million, two hundred thirteen thousand, one hundred twelve".