10431231221 has 4 divisors (see below), whose sum is σ = 10526930700. Its totient is φ = 10335531744.

The previous prime is 10431231163. The next prime is 10431231247. The reversal of 10431231221 is 12213213401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12213213401 = 70003 ⋅174467.

It can be written as a sum of positive squares in 2 ways, for example, as 7790710225 + 2640520996 = 88265^2 + 51386^2 .

It is a cyclic number.

It is not a de Polignac number, because 10431231221 - 2⁶ = 10431231157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10431231193 and 10431231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10431231721) 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, 47849576 + ... + 47849793.

It is an arithmetic number, because the mean of its divisors is an integer number (2631732675).

Almost surely, 2^10431231221 is an apocalyptic number.

It is an amenable number.

10431231221 is a deficient number, since it is larger than the sum of its proper divisors (95699479).

10431231221 is an equidigital number, since it uses as much as digits as its factorization.

10431231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95699478.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 10431231221 its reverse (12213213401), we get a palindrome (22644444622).

The spelling of 10431231221 in words is "ten billion, four hundred thirty-one million, two hundred thirty-one thousand, two hundred twenty-one".