22121530 has 8 divisors (see below), whose sum is σ = 39818772. Its totient is φ = 8848608.

The previous prime is 22121521. The next prime is 22121531. The reversal of 22121530 is 3512122.

It can be written as a sum of positive squares in 2 ways, for example, as 21427641 + 693889 = 4629^2 + 833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (22121531) 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 3 ways as a sum of consecutive naturals, for example, 1106067 + ... + 1106086.

Almost surely, 2^22121530 is an apocalyptic number.

22121530 is a deficient number, since it is larger than the sum of its proper divisors (17697242).

22121530 is a wasteful number, since it uses less digits than its factorization.

22121530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212160.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 22121530 is about 4703.3530592546. The cubic root of 22121530 is about 280.7189432386.

Adding to 22121530 its reverse (3512122), we get a palindrome (25633652).

The spelling of 22121530 in words is "twenty-two million, one hundred twenty-one thousand, five hundred thirty".