4040312121 has 12 divisors (see below), whose sum is σ = 5971728048. Its totient is φ = 2630900664.

The previous prime is 4040312113. The next prime is 4040312131. The reversal of 4040312121 is 1212130404.

It is not a de Polignac number, because 4040312121 - 2³ = 4040312113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4040312094 and 4040312103.

It is not an unprimeable number, because it can be changed into a prime (4040312131) 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, 5219655 + ... + 5220428.

It is an arithmetic number, because the mean of its divisors is an integer number (497644004).

Almost surely, 2^4040312121 is an apocalyptic number.

It is an amenable number.

4040312121 is a deficient number, since it is larger than the sum of its proper divisors (1931415927).

4040312121 is a wasteful number, since it uses less digits than its factorization.

4040312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10440132 (or 10440129 counting only the distinct ones).

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

The square root of 4040312121 is about 63563.4495681284. The cubic root of 4040312121 is about 1592.7158627527.

Adding to 4040312121 its reverse (1212130404), we get a palindrome (5252442525).

The spelling of 4040312121 in words is "four billion, forty million, three hundred twelve thousand, one hundred twenty-one".