4231240121 has 4 divisors (see below), whose sum is σ = 4241792244. Its totient is φ = 4220688000.

The previous prime is 4231240063. The next prime is 4231240147. The reversal of 4231240121 is 1210421324.

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 2098647721 + 2132592400 = 45811^2 + 46180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4231240121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4231240093 and 4231240102.

It is not an unprimeable number, because it can be changed into a prime (4231240171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5275460 + ... + 5276261.

It is an arithmetic number, because the mean of its divisors is an integer number (1060448061).

Almost surely, 2^4231240121 is an apocalyptic number.

It is an amenable number.

4231240121 is a deficient number, since it is larger than the sum of its proper divisors (10552123).

4231240121 is a wasteful number, since it uses less digits than its factorization.

4231240121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552122.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 4231240121 is about 65047.9832200815. The cubic root of 4231240121 is about 1617.4190627164.

Adding to 4231240121 its reverse (1210421324), we get a palindrome (5441661445).

The spelling of 4231240121 in words is "four billion, two hundred thirty-one million, two hundred forty thousand, one hundred twenty-one".