4331631121 has 4 divisors (see below), whose sum is σ = 4335602544. Its totient is φ = 4327659700.

The previous prime is 4331631103. The next prime is 4331631131. The reversal of 4331631121 is 1211361334.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1211361334 = 2 ⋅605680667.

It is a cyclic number.

It is not a de Polignac number, because 4331631121 - 2⁵ = 4331631089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4331631131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984075 + ... + 1986256.

It is an arithmetic number, because the mean of its divisors is an integer number (1083900636).

Almost surely, 2^4331631121 is an apocalyptic number.

It is an amenable number.

4331631121 is a deficient number, since it is larger than the sum of its proper divisors (3971423).

4331631121 is a wasteful number, since it uses less digits than its factorization.

4331631121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971422.

The product of its digits is 1296, while the sum is 25.

The square root of 4331631121 is about 65815.1283596712. The cubic root of 4331631121 is about 1630.1109138272.

Adding to 4331631121 its reverse (1211361334), we get a palindrome (5542992455).

The spelling of 4331631121 in words is "four billion, three hundred thirty-one million, six hundred thirty-one thousand, one hundred twenty-one".