4000240121 has 4 divisors (see below), whose sum is σ = 4029439092. Its totient is φ = 3971041152.

The previous prime is 4000240117. The next prime is 4000240141. The reversal of 4000240121 is 1210420004.

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 2915460025 + 1084780096 = 53995^2 + 32936^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000240121 - 2² = 4000240117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4000240096 and 4000240105.

It is not an unprimeable number, because it can be changed into a prime (4000240141) 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, 14599280 + ... + 14599553.

It is an arithmetic number, because the mean of its divisors is an integer number (1007359773).

Almost surely, 2^4000240121 is an apocalyptic number.

It is an amenable number.

4000240121 is a deficient number, since it is larger than the sum of its proper divisors (29198971).

4000240121 is a wasteful number, since it uses less digits than its factorization.

4000240121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29198970.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4000240121 is about 63247.4514980643. The cubic root of 4000240121 is about 1587.4328153600.

Adding to 4000240121 its reverse (1210420004), we get a palindrome (5210660125).

The spelling of 4000240121 in words is "four billion, two hundred forty thousand, one hundred twenty-one".