10331232221 has 4 divisors (see below), whose sum is σ = 10400569500. Its totient is φ = 10261894944.

The previous prime is 10331232209. The next prime is 10331232227. The reversal of 10331232221 is 12223213301.

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 3584416900 + 6746815321 = 59870^2 + 82139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10331232221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10331232193 and 10331232202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10331232227) 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, 34668416 + ... + 34668713.

It is an arithmetic number, because the mean of its divisors is an integer number (2600142375).

Almost surely, 2^10331232221 is an apocalyptic number.

It is an amenable number.

10331232221 is a deficient number, since it is larger than the sum of its proper divisors (69337279).

10331232221 is an equidigital number, since it uses as much as digits as its factorization.

10331232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69337278.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 10331232221 its reverse (12223213301), we get a palindrome (22554445522).

The spelling of 10331232221 in words is "ten billion, three hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty-one".