10221321331 has 4 divisors (see below), whose sum is σ = 11007576832. Its totient is φ = 9435065832.

The previous prime is 10221321293. The next prime is 10221321343. The reversal of 10221321331 is 13312312201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10221321331 - 2¹⁵ = 10221288563 is a prime.

It is a super-2 number, since 2×10221321331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221321299 and 10221321308.

It is not an unprimeable number, because it can be changed into a prime (10221331331) 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, 393127731 + ... + 393127756.

It is an arithmetic number, because the mean of its divisors is an integer number (2751894208).

Almost surely, 2^10221321331 is an apocalyptic number.

10221321331 is a deficient number, since it is larger than the sum of its proper divisors (786255501).

10221321331 is an equidigital number, since it uses as much as digits as its factorization.

10221321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786255500.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 10221321331 its reverse (13312312201), we get a palindrome (23533633532).

The spelling of 10221321331 in words is "ten billion, two hundred twenty-one million, three hundred twenty-one thousand, three hundred thirty-one".