22125321 has 6 divisors (see below), whose sum is σ = 31958810. Its totient is φ = 14750208.

The previous prime is 22125319. The next prime is 22125377. The reversal of 22125321 is 12352122.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 1550025 = 4536^2 + 1245^2 .

It is not a de Polignac number, because 22125321 - 2¹ = 22125319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22125294 and 22125303.

It is not an unprimeable number, because it can be changed into a prime (22125821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1229176 + ... + 1229193.

Almost surely, 2^22125321 is an apocalyptic number.

It is an amenable number.

22125321 is a deficient number, since it is larger than the sum of its proper divisors (9833489).

22125321 is a wasteful number, since it uses less digits than its factorization.

22125321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458375 (or 2458372 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 22125321 is about 4703.7560523480. The cubic root of 22125321 is about 280.7349780657.

Adding to 22125321 its reverse (12352122), we get a palindrome (34477443).

The spelling of 22125321 in words is "twenty-two million, one hundred twenty-five thousand, three hundred twenty-one".