4012012321 has 4 divisors (see below), whose sum is σ = 4029231492. Its totient is φ = 3994793152.

The previous prime is 4012012259. The next prime is 4012012339. The reversal of 4012012321 is 1232102104.

4012012321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2645970721 + 1366041600 = 51439^2 + 36960^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012012321 - 2¹⁷ = 4011881249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4012012295 and 4012012304.

It is not an unprimeable number, because it can be changed into a prime (4012012421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8609236 + ... + 8609701.

It is an arithmetic number, because the mean of its divisors is an integer number (1007307873).

Almost surely, 2^4012012321 is an apocalyptic number.

It is an amenable number.

4012012321 is a deficient number, since it is larger than the sum of its proper divisors (17219171).

4012012321 is a wasteful number, since it uses less digits than its factorization.

4012012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17219170.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 4012012321 is about 63340.4477486543. The cubic root of 4012012321 is about 1588.9884948703.

Adding to 4012012321 its reverse (1232102104), we get a palindrome (5244114425).

It can be divided in two parts, 40120 and 12321, that added together give a square (52441 = 229²).

The spelling of 4012012321 in words is "four billion, twelve million, twelve thousand, three hundred twenty-one".