2112123204 has 36 divisors (see below), whose sum is σ = 5347365660. Its totient is φ = 702935040.

The previous prime is 2112123203. The next prime is 2112123227. The reversal of 2112123204 is 4023212112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 855562500 + 1256560704 = 29250^2 + 35448^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2112123204² = 8922128857750451232, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (2112123203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22689 + ... + 68840.

It is an arithmetic number, because the mean of its divisors is an integer number (148537935).

Almost surely, 2^2112123204 is an apocalyptic number.

It is an amenable number.

2112123204 is an abundant number, since it is smaller than the sum of its proper divisors (3235242456).

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

2112123204 is a wasteful number, since it uses less digits than its factorization.

2112123204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92180 (or 92175 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2112123204 is about 45957.8415942263. The cubic root of 2112123204 is about 1283.0386798124.

Adding to 2112123204 its reverse (4023212112), we get a palindrome (6135335316).

It can be divided in two parts, 2112 and 123204, that added together give a square (125316 = 354²).

The spelling of 2112123204 in words is "two billion, one hundred twelve million, one hundred twenty-three thousand, two hundred four".