22130321 has 2 divisors, whose sum is σ = 22130322. Its totient is φ = 22130320.

The previous prime is 22130293. The next prime is 22130341. The reversal of 22130321 is 12303122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14899600 + 7230721 = 3860^2 + 2689^2 .

It is a cyclic number.

It is not a de Polignac number, because 22130321 - 2⁶ = 22130257 is a prime.

It is a super-2 number, since 2×22130321² = 979502215126082, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22130296 and 22130305.

It is not a weakly prime, because it can be changed into another prime (22130341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065160 + 11065161.

It is an arithmetic number, because the mean of its divisors is an integer number (11065161).

Almost surely, 2^22130321 is an apocalyptic number.

It is an amenable number.

22130321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22130321 is an equidigital number, since it uses as much as digits as its factorization.

22130321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 22130321 is about 4704.2875124720. The cubic root of 22130321 is about 280.7561238104.

Adding to 22130321 its reverse (12303122), we get a palindrome (34433443).

The spelling of 22130321 in words is "twenty-two million, one hundred thirty thousand, three hundred twenty-one".